Can't Sleep After a Big Stock Loss? 9 Things to Do Before You Touch Your Portfolio Again
It's 3:07 a.m.
The house is quiet. Your spouse is asleep. And you're lying on your side with the screen brightness turned all the way down, refreshing a red number that hasn't changed since the market closed.
You already know the figure by heart. You've done the math four different ways. You've replayed the moment you clicked "buy" so many times it feels like a scene from a film you can't stop watching. And somewhere around 2 a.m., you started planning how you'll win it all back the minute the market opens.
Stop right there.
Over the years, many investors have come to me in exactly this state. Smart, successful people who run businesses and raise families, suddenly unable to sleep, eat or think about anything except a position that went against them. What I've learned is simple: the most expensive decisions in investing are made by tired, frightened people at the worst possible moment. The loss that's keeping you awake is real. But the next loss, the one you make because you're exhausted and desperate to feel better, is the one that can truly hurt you.
This guide is your circuit breaker. First, I'll show you what the research says a big loss does to your brain and body, so you understand that what you're feeling is normal, measurable and temporary. Then I'll walk you through nine things to do, in order, before you touch your portfolio again.
Read it slowly. You have time. The market will still be there in the morning.
What a big stock loss actually does to your mind and body
Let's start with the good news, even if it doesn't feel like good news yet: you are not weak, foolish or "bad with money." You are having a completely predictable human reaction to a financial shock, one that economists and doctors have been measuring for decades.
Your brain counts a loss at roughly double
In 1979, psychologists Daniel Kahneman and Amos Tversky published the work that would later earn Kahneman a Nobel Prize. Their central finding: losses loom larger than gains. When they put a number on it in 1992, they estimated that a loss hurts about 2.25 times as much as an equal gain feels good. A 2024 meta-analysis of 607 estimates from 150 studies landed a little lower, at roughly 2. Either way, the message holds. Lose $10,000 and your brain processes it with about the emotional weight of missing out on $20,000 of gains.
That's why a 15% drop can wreck your week while a 15% gain is forgotten by Friday. It isn't a character flaw. It's wiring.
Market drops show up in hospital records
Finance professors Joseph Engelberg and Christopher Parsons of UC San Diego matched every hospital admission in California from 1983 to 2011 against daily stock market returns. Their study, published in the Journal of Finance in 2016, found a strong pattern: when stocks fall, admissions rise, especially for anxiety, panic disorder and major depression.
On Black Monday, October 19, 1987, when U.S. stocks fell more than 20% in a single session, California hospital admissions jumped by more than 5% right away. Even an ordinary bad day, a drop of around 1.5%, was linked to a small but measurable rise in admissions over the following two days. The researchers estimated the extra hospital bills at a minimum of $77 million a year in California alone.
Notice the timing. The effect showed up the same day, long before anyone could have lost a house or a job. It was pure worry.
The 2008 crash changed how people felt
Economists Melissa McInerney, Jennifer Mellor and Lauren Nicholas found a clever natural experiment. The 2008 wave of the U.S. Health and Retirement Study happened to interview some older Americans before the October 2008 crash and some after it. Those interviewed after the crash reported more feelings of depression and were more likely to be taking antidepressants, and the effects were largest among people who held the most stock. By their estimate, losing $50,000 of non-housing wealth raised the chance of feeling depressed by about 8%.
Here's the part I want you to hold on to. The researchers found the crash changed how people felt, but they found no rise in clinically measured depression. A big loss can make you feel terrible for a while. That is not the same as being broken.
Losses push people toward bad habits
In a study titled "The Dow Is Killing Me" (Health Economics, 2015), economists Chad Cotti, Richard Dunn and Nathan Tefft tracked American health behaviour against the Dow Jones Industrial Average. Large monthly drops in the Dow were linked to more days of poor mental health, more smoking, more binge drinking and, during the 2008 to 2009 crash, a sharp rise in fatal car accidents involving alcohol.
Keep that in mind tonight. The danger after a loss isn't only another bad trade. It's the extra drinks, the cigarettes you quit years ago, the drive you shouldn't be taking.
For some people, it reaches the body
Economist Hannes Schwandt used stock market booms and busts as a natural experiment among stock-owning retirees. In his 2018 paper in the American Economic Journal: Applied Economics, a 10% loss of wealth was associated with measurable declines in physical health, mental health and survival, with the clearest effect on high blood pressure.
The most sobering number comes from a 2018 study in JAMA. Lindsay Pool and colleagues followed 8,714 Americans aged 51 to 61 for up to 20 years. Those who lost 75% or more of their total net worth within two years (everything, not just their stocks) had a 50% higher risk of dying during the study period than people whose wealth stayed steady.
I don't share that to frighten you. I share it because it proves something important: how you handle the weeks after a big loss matters for your health, not just your money. Every study here describes a pattern, not a destiny. And nearly all of the risk runs through stress, sleep, habits and decisions, which are exactly the things you can still control.
Study | Who was studied | What they found |
|---|---|---|
Engelberg & Parsons, Journal of Finance (2016) | Every hospital admission in California, 1983 to 2011 | Admissions rise when stocks fall, especially for anxiety and panic. Black Monday 1987 brought a jump of more than 5%. |
McInerney, Mellor & Nicholas, Journal of Health Economics (2013) | Older Americans interviewed before and after the 2008 crash | Each $50,000 lost raised the chance of feeling depressed by about 8%, with more antidepressant use. |
Cotti, Dunn & Tefft, Health Economics (2015) | U.S. adults, tracked against the Dow | Big falls in the Dow linked to more poor mental health days, smoking and binge drinking. |
Schwandt, AEJ: Applied Economics (2018) | Stock-owning U.S. retirees | A 10% wealth loss was linked to worse physical and mental health and lower survival. |
Pool et al., JAMA (2018) | 8,714 Americans aged 51 to 61, followed for up to 20 years | Losing 75% or more of total net worth within 2 years: 50% higher risk of death. |
You are far from alone
In a 2019 Bankrate survey of more than 2,500 U.S. adults, 56% said they lose sleep over at least one money issue. In 2025, Bankrate found that 43% of Americans say money harms their mental health at least occasionally, through anxiety, stress, worry and lost sleep. It was the third year in a row that money topped the list.
So if you're reading this at 3 a.m., know that millions of people are lying awake doing the same arithmetic.
Why the 3 a.m. version of you should never be allowed to trade
Here is the trap.
A loss keeps you awake. Lack of sleep changes how your brain weighs risk. That shift pushes you toward exactly the trades most likely to deepen the loss. And a deeper loss keeps you awake again.
The science behind that middle step is striking. In a 2011 study in the Journal of Neuroscience, researchers from Duke University and Duke-NUS Medical School in Singapore scanned the brains of 29 healthy adults while they made money decisions, once after a normal night's sleep and once after a night without sleep. After one sleepless night, volunteers shifted from protecting themselves against losses to chasing bigger gains. Brain regions tied to reward became more active, while the region that registers the sting of a loss went quieter. Crucially, the shift wasn't explained by drowsiness. The lead researcher noted that coffee might sharpen your attention, but it won't repair how you value a gamble.
Translate that into investing. The sleep-deprived brain is primed for "win it back" trades: doubling down, buying options, adding leverage, jumping into whatever stock is moving today. It's precisely the wrong state of mind at precisely the wrong moment.
And the cost of acting on impulse is well documented. When Brad Barber and Terrance Odean studied 66,465 brokerage households from 1991 to 1996, the most active traders earned 11.4% a year while the market returned 17.9%. DALBAR's long-running study of fund investors tells the same story from another angle. In 2024, the average equity fund investor earned 16.54% while the S&P 500 returned 25.02%, a gap of almost 8.5 percentage points, driven largely by money pulled out at the wrong time. Investors did much better in 2025, when the gap shrank to under one point. But over the 20 years to the end of 2024, the behaviour gap still compounded into 9.24% a year for the average investor against 10.35% for the index.
The lesson isn't "never sell." It's this: don't make a big money decision with a brain that hasn't slept. Which brings us to the nine steps.
9 things to do before you touch your portfolio again
Do them in order. The first five calm your body and buy you time. The last four help you make a clear-headed decision once you've rested.
1. Put a 72-hour lock on your portfolio
Make yourself one simple promise: no buying, no selling and no "just checking" for the next 72 hours. Three nights of sleep is usually enough for the first wave of panic to pass.
Make the promise easier to keep:
Log out of your brokerage app and move it off your home screen, or delete it for now. You can reinstall it in 30 seconds when you're ready.
Turn off price alerts and push notifications from finance apps and news sites.
Unfollow the market-crash videos and forums for a few days. They're designed to keep you watching, not to help you.
Tell your spouse or a friend about the lock, so someone can hold you to it.
One exception: if you've borrowed to invest or you're facing a margin call, go straight to Step 7 today. That situation can't wait three days.
Why does the lock work? In a 1997 experiment published in the Quarterly Journal of Economics, Richard Thaler, Amos Tversky, Daniel Kahneman and Alan Schwartz found that people who saw their investment results most often took the least risk and finished with the weakest results. Frequent feedback feeds loss aversion. Less looking leads to better decisions.
The lock also keeps you invested through the days that matter most. According to Franklin Templeton, $10,000 invested in the S&P 500 at the start of 2006 grew to about $80,619 by the end of 2025. Miss just the 10 best days out of 5,031 trading days and you'd have ended with about $35,866. Research from J.P. Morgan Asset Management has repeatedly found that most of the market's best days arrive within a couple of weeks of its worst days, exactly when frightened investors are most tempted to bail out.
2. Name what you're feeling, out loud or on paper
Before you analyse anything, label the emotion. Not just "I'm stressed." Be specific: "I feel ashamed." "I'm scared we won't be able to retire on time." "I'm furious with myself for ignoring my own rule."
This isn't fluffy self-help. In a 2007 brain-imaging study in Psychological Science, UCLA psychologist Matthew Lieberman and colleagues found that putting feelings into words, which they called affect labeling, calmed the amygdala, the brain's alarm system, while activating a part of the prefrontal cortex that helps regulate emotion. Naming the feeling turns down the volume.
Try this tonight. Take a piece of paper and finish these three sentences:
Right now, I feel…
The thing I'm most afraid of is…
The story I'm telling myself about who I am because of this loss is…
That third line matters most. After a big loss, most people quietly tell themselves "I'm an idiot" or "I've ruined everything." Seeing it written down helps you notice it's a story, not a fact. A loss is an event. It is not your identity.
3. Separate the number on the screen from what it means for your life
At 3 a.m., a loss feels endless. On paper, it has edges. Give it edges.
Write down three numbers:
The dollar loss: how much the position or portfolio is down from its peak.
The loss as a share of your total net worth: include your home equity, savings, retirement accounts (EPF, CPF, 401(k) or similar) and any business you own. A $40,000 loss looks catastrophic on a trading screen. As 6% of your net worth, it's painful but survivable.
What actually changes in the next 12 months: will you miss a mortgage payment or pull a child out of school? Or will daily life carry on almost exactly as before?
Also note whether the loss is realized (you've sold) or unrealized (you still hold). An unrealized loss on a broad, diversified index fund is a temporary price, not a final result. An unrealized loss on a single speculative stock may or may not come back, which is exactly the question you'll answer calmly in Step 9.
For most readers, this exercise shrinks the problem. Not because the money doesn't matter, but because your brain has been treating a bruise like an amputation.
4. Get your body out of fight-or-flight first
You can't reason your way out of a racing heart. Calm the body first, and the mind will follow.
The simplest tool with solid evidence behind it is the "cyclic sigh." In a randomized trial published in Cell Reports Medicine in 2023, Stanford researchers compared three breathing techniques with mindfulness meditation over a month. Five minutes a day of cyclic sighing, the exercise built around a long, slow exhale, produced the greatest improvement in mood and the biggest drop in breathing rate.
Here's how to do it:
Breathe in through your nose until your lungs feel comfortably full.
Take a second, shorter sip of air through your nose to top them up.
Breathe out slowly and completely through your mouth, taking longer than both inhales combined.
Repeat for five minutes.
Then, tomorrow, move. A brisk 20 to 30 minute walk, ideally outdoors in the morning, helps your body work through the stress response, and daylight helps reset a body clock that a few bad nights have knocked out of rhythm.
5. Fix tonight's sleep, not your portfolio
Your job tonight is not to solve the loss. It's to sleep. The tips below come from cognitive behavioural therapy for insomnia (CBT-I), which the American College of Physicians recommends as the first treatment for chronic insomnia in adults, ahead of sleeping pills.
Schedule a "worry window" early in the evening. Spend 15 minutes at a table around 7 or 8 p.m. writing down every money worry and one next step for each. When a worry shows up at midnight, tell yourself: "That's on the list. I'll deal with it tomorrow."
Charge your phone outside the bedroom. If you can't see the number, you can't refresh it.
Get up if you can't sleep. If you've been awake for what feels like 20 minutes, go to another room with dim light and read something dull. Go back to bed only when you feel sleepy. This teaches your brain that bed is for sleep, not financial forensics.
Keep the same wake-up time, even after a terrible night. Sleeping in pushes the problem into the next night.
Go easy on the "helpers." Alcohol may knock you out, but it breaks up your sleep later in the night. And remember the Dow study. Caffeine after lunch works against you too.
If poor sleep keeps coming back three or more nights a week, talk to your doctor. Insomnia is usually called chronic when it lasts at least three months, but you don't need to wait that long to get help. It's common, and it's very treatable.
6. Look at history, not headlines
When you're nursing a loss, the news feed is designed to keep you scared. History is calmer company.
The chart below shows six major S&P 500 bear markets over the last half century. Every one of them felt like the end of the world at the time. Every one was eventually recovered, although, to be honest with you, some took years.
A few facts worth taping to your fridge:
From 1937 through 2025, the S&P 500 finished the year higher 68 times and lower only 21 times, about three up years for every down year. The average up year gained about 19.9%; the average down year lost about 12.5%, according to Franklin Templeton.
In early 2025, the tariff shock knocked the S&P 500 down almost 19% in about seven weeks. By late June it was back at a record high.
Recovery speed depends on what you own. A broad index fund holds hundreds of companies and steadily replaces the weak with the strong. A single stock can fall and never come back. I've broken down the real numbers in How Long Does It Take to Recover From a 50% Stock Market Loss?
History can't tell you what happens next month. It can remind you that panic, more than the decline itself, is what usually turns a temporary loss into a permanent one.
7. Check whether this is a bruise or a real emergency
Most losses are bruises: painful, but they don't change how you live. A few are genuine emergencies that need prompt action, taken calmly and with help. Ask yourself three questions.
Did I borrow to invest? Margin loans, leveraged ETFs, options, contracts for difference (CFDs) and money borrowed against your home can force a sale at the worst moment, and some can lose more than you put in. If that's you, call your broker today to understand your margin position and speak to a licensed financial adviser. This is the one situation where waiting 72 hours can cost more than acting.
Do I need this money in the next three to five years? Money for a house deposit, school fees or near-term retirement income is especially exposed to market swings. The answer is a sensible plan for future contributions and withdrawals, made with a clear head, not a panicked sale at the bottom.
Is the loss concentrated in one stock, sector or theme? A falling index fund and a collapsing single company are very different problems. The first is usually a matter of time. The second needs an honest look at whether the reason you bought still holds.
If you answered "no" to all three, you have a painful bruise, not a broken bone, and the best move is very often to do less, not more. If you answered "yes" to any of them, the decision deserves a second opinion from a licensed financial adviser who can see your whole picture. For a calm framework you can use either way, read Should You Sell at a Loss or Wait to Break Even?
Remember the JAMA study's threshold, too: a loss of 75% of total net worth. Most people never get close, because their wealth is spread across far more than one trading account. That's exactly why Step 3 matters.
8. Tell one person, and keep an eye on how you're coping
Shame grows in the dark. The longer you hide a loss, the heavier it feels, and the more likely you are to try to "fix" it with a secret, risky trade.
Choose one person, ideally your spouse or partner if you share finances, and tell them the truth: what happened, roughly how much, and how you're feeling. You don't need a solution ready. If you're dreading that conversation, I've written a step-by-step guide: How to Tell Your Spouse You Lost Money in the Stock Market.
At the same time, keep an honest eye on how you're coping. Remember the research linking market falls to more drinking, smoking and alcohol-related crashes. Watch for these red flags in yourself:
Drinking more than usual to "switch off"
Revenge trading: bigger, faster bets to win it back
Hiding statements or trades from your family
Skipping meals, exercise or sleep to watch the markets
Pulling away from people you normally enjoy
One or two of these for a day or two is human. If they settle in, take that as your signal to bring in more support.
9. Write your "never again" rules before you place another trade
When you've had three decent nights of sleep, and not before, sit down with a cup of coffee and turn this loss into tuition.
Ask what exactly went wrong. Not "the market crashed," because markets always crash eventually. Dig into the decision itself:
Was too much of my money in one stock or theme?
Did I buy because of a tip, a forum post or a fear of missing out?
Did I have a plan for what I'd do if it fell 20%, 30% or 50%?
Was I investing money I'd need soon?
Then write a short set of rules, your personal investment policy, and keep it where you'll see it before every trade. For example:
"No single stock will ever be more than 5% of my portfolio."
"Most of my long-term money goes into broad, low-cost index funds, every month, automatically."
"I don't trade with borrowed money."
"I never make a buy or sell decision after 10 p.m., or within 24 hours of a big market move."
"I check my long-term portfolio once a month, not once an hour."
That fourth rule ties straight back to the sleep science.
For many investors, the biggest change after a painful loss is moving the core of their money away from stock picking and into a simple, diversified index fund strategy. It's the approach I've written about for years, because it removes most of the decisions that keep people awake at night. If you've been burned by trading, start with How to Stop Losing Money in the Stock Market and You Lost More Than $100K in the Stock Market? Here's How to Deal With the Pain.
When it's more than a bad night
Sometimes a loss reaches deeper than sleep. Please reach out for help straight away if you notice any of these:
Feeling hopeless, worthless or like a burden on your family
Losing interest in things you normally care about for two weeks or more
Relying on alcohol or other substances to get through the day
Panic attacks, chest pain or a racing heart that won't settle (see a doctor promptly to rule out a medical cause)
Any thoughts of harming yourself, or that your family would be better off without you
If any of that sounds familiar, please talk to someone today. You don't need to be in crisis to call. Money can be rebuilt. You can't be replaced.
Malaysia: Befrienders Kuala Lumpur at 03-7627 2929 (24 hours, free and confidential), or the Ministry of Health's Talian HEAL at 15555 (8 a.m. to midnight, daily). In an emergency, call 999.
United States: call or text 988.
Anywhere else: find a free, confidential helpline in your country at findahelpline.com.
And see your doctor. Ongoing insomnia, anxiety and low mood are common, treatable conditions. They are not a weakness.
The loss is real. So is the recovery.
Here's what watching investors go through this has taught me. The people who come out of a big loss in good shape aren't the ones who were never hurt. They're the ones who refused to make the second mistake.
They paused. They slept. They told someone. They looked at the facts in daylight. Then they made a plan simple enough to follow on their worst day.
You can do the same, starting tonight. Put your phone in another room. Do five minutes of cyclic sighing. Write down your three sentences. Tomorrow morning, take the walk. The market will open with or without you, and it can wait 72 hours.
Your money may take a while to recover. Your sleep, your health and your judgment can start recovering tonight.
Frequently asked questions
Is it normal to lose sleep after losing money in the stock market?
Yes. In a 2019 Bankrate survey, 56% of U.S. adults said they lose sleep over at least one money issue, and hospital records show anxiety-related admissions rise when stocks fall. Because a loss hurts about twice as much as an equal gain feels good, a few rough nights after a big loss is a normal stress reaction. If poor sleep lasts for weeks, speak to your doctor.
Should I sell everything after a big stock loss?
Usually not in the first few days. Selling in a panic locks in the loss and risks missing the market's best days, which often arrive soon after the worst ones. Put a 72-hour lock on your portfolio first, then decide with a rested mind. The exception is borrowed money: if you're on margin or using leverage, talk to your broker and a licensed financial adviser right away.
How long does the anxiety after a stock loss last?
For most people, the sharpest panic eases within days to a few weeks, especially once sleep gets back to normal. Research on the 2008 crash found it changed how people felt without raising clinically measured depression. If low mood, anxiety or insomnia lasts more than two weeks or gets in the way of daily life, get professional help.
How can I stop checking my portfolio all the time?
Make checking harder. Log out of your brokerage app, take it off your home screen, switch off price alerts and charge your phone outside the bedroom. Then set a simple rule, such as reviewing long-term investments once a month. In a classic experiment by Thaler, Kahneman and colleagues, people who saw their results most often took the least risk and ended up with the weakest results.
Can a stock market loss affect my physical health?
It can. Studies link market falls to more hospital admissions, more smoking and binge drinking, and higher blood pressure among retirees who own stocks. A 2018 JAMA study found people who lost 75% or more of their total net worth within two years had a 50% higher risk of death. Protecting your sleep, habits and stress levels after a loss is part of protecting your health.
Sources
Pool, L.R. et al. Association of a Negative Wealth Shock With All-Cause Mortality. JAMA, 2018.
Engelberg, J. & Parsons, C.A. Worrying about the Stock Market: Evidence from Hospital Admissions. Journal of Finance, 2016.
McInerney, M., Mellor, J.M. & Nicholas, L.H. Recession Depression: Mental Health Effects of the 2008 Stock Market Crash. Journal of Health Economics, 2013.
Cotti, C., Dunn, R.A. & Tefft, N. The Dow Is Killing Me: Risky Health Behaviors and the Stock Market. Health Economics, 2015.
Schwandt, H. Wealth Shocks and Health Outcomes: Evidence from Stock Market Fluctuations. American Economic Journal: Applied Economics, 2018.
Venkatraman, V. et al. Sleep Deprivation Biases the Neural Mechanisms Underlying Economic Preferences. Journal of Neuroscience, 2011.
Kahneman, D. & Tversky, A. Prospect Theory: An Analysis of Decision under Risk. Econometrica, 1979.
Tversky, A. & Kahneman, D. Advances in Prospect Theory: Cumulative Representation of Uncertainty. Journal of Risk and Uncertainty, 1992.
Brown, A.L. et al. Meta-Analysis of Empirical Estimates of Loss Aversion. Journal of Economic Literature, 2024.
Barber, B.M. & Odean, T. Trading Is Hazardous to Your Wealth. Journal of Finance, 2000.
Thaler, R.H., Tversky, A., Kahneman, D. & Schwartz, A. The Effect of Myopia and Loss Aversion on Risk Taking. Quarterly Journal of Economics, 1997.
Lieberman, M.D. et al. Putting Feelings Into Words: Affect Labeling Disrupts Amygdala Activity. Psychological Science, 2007.
Balban, M.Y. et al. Brief Structured Respiration Practices Enhance Mood and Reduce Physiological Arousal. Cell Reports Medicine, 2023.
Qaseem, A. et al. Management of Chronic Insomnia Disorder in Adults (American College of Physicians guideline). Annals of Internal Medicine, 2016.
DALBAR. Quantitative Analysis of Investor Behavior (QAIB), 2025 and 2026 editions.
Franklin Templeton. Market performance and missed best days data, 2026.
401(k) Specialist. Folly of 'Timing the Market' Explained in JPMAM's 2024 Guide to Retirement, 2024.
CNBC. 56% of Americans lose sleep over money (Bankrate survey), 2019.
Bankrate. For the third straight year, money is the top factor negatively impacting Americans' mental health, 2025.
Bear market chart data: Yardeni Research and Hartford Funds, S&P 500 price index.
Helplines: Befrienders Kuala Lumpur and Find A Helpline.
This article is for general education only. It is not financial, medical or psychological advice. Past market performance does not guarantee future results. Please speak to licensed professionals about your own situation.
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