You are misunderstanding what makes the price of a stock go up and down.

Every time you sell a share of a stock, there is someone else that buys the stock. So it is not accurate to say that stock prices go down when large amounts of the stock are sold, and up when large amounts of the stock are bought. Every day, the amount of shares of a stock that are bought and sold are equal to each other, because in order to sell a share of stock, someone has to buy it.

Let me try to explain what actually happens to the price of a stock when you want to sell it.

Let's say that a particular stock is listed on the ticker at $100 a share currently. All this means is that the last transaction that took place was for $100; someone sold their share to a buyer for $100.

Now let's say that you have a share of the stock you'd like to sell. You are hoping to get $100 for your share. There are 2 other people that also have a share that they want to sell. However, there is only 1 person that wants to buy a share of stock, and he only wants to pay $99 for a share. If none of you wants to sell lower than $100, then no shares get sold. But if one of you agrees to sell at $99, then the sale takes place. The ticker value of the stock is now $99 instead of $100.

Now let's say that there are 3 new people that have decided they want to buy a share of the stock. They'd like to buy at $99, but you and the other person left with a share want to sell at $100. Either one of the sellers will come down to $99 or one of the buyers will go up to $100. This process will continue until everyone that wants to sell a share has sold, and everyone who wants to buy a share has bought. In general, though, when there are more people that want to sell than buy, the price goes down, and when there are more people that want to buy than sell, the price goes up.

To answer your question, if your selling of the stock had caused the price to go down, it means that you would have gotten less money for your stock than if it had not gone down. Likewise, if your buying the stock had caused it to go up, it just means that it would have cost you more to buy the stock. It is just as likely that you would lose money doing this, rather than gain money.

Answer from Ben Miller on Stack Exchange
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You are misunderstanding what makes the price of a stock go up and down.

Every time you sell a share of a stock, there is someone else that buys the stock. So it is not accurate to say that stock prices go down when large amounts of the stock are sold, and up when large amounts of the stock are bought. Every day, the amount of shares of a stock that are bought and sold are equal to each other, because in order to sell a share of stock, someone has to buy it.

Let me try to explain what actually happens to the price of a stock when you want to sell it.

Let's say that a particular stock is listed on the ticker at $100 a share currently. All this means is that the last transaction that took place was for $100; someone sold their share to a buyer for $100.

Now let's say that you have a share of the stock you'd like to sell. You are hoping to get $100 for your share. There are 2 other people that also have a share that they want to sell. However, there is only 1 person that wants to buy a share of stock, and he only wants to pay $99 for a share. If none of you wants to sell lower than $100, then no shares get sold. But if one of you agrees to sell at $99, then the sale takes place. The ticker value of the stock is now $99 instead of $100.

Now let's say that there are 3 new people that have decided they want to buy a share of the stock. They'd like to buy at $99, but you and the other person left with a share want to sell at $100. Either one of the sellers will come down to $99 or one of the buyers will go up to $100. This process will continue until everyone that wants to sell a share has sold, and everyone who wants to buy a share has bought. In general, though, when there are more people that want to sell than buy, the price goes down, and when there are more people that want to buy than sell, the price goes up.

To answer your question, if your selling of the stock had caused the price to go down, it means that you would have gotten less money for your stock than if it had not gone down. Likewise, if your buying the stock had caused it to go up, it just means that it would have cost you more to buy the stock. It is just as likely that you would lose money doing this, rather than gain money.

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I think the simple answer to your question is: Yes, when you sell, that drives down the price. But it's not like you sell, and THEN the price goes down. The price goes down when you sell. You get the lower price.

Others have discussed the mechanics of this, but I think the relevant point for your question is that when you offer shares for sale, buyers now have more choices of where to buy from. If without you, there were 10 people willing to sell for $100 and 10 people willing to buy for $100, then there will be 10 sales at $100. But if you now offer to sell, there are 11 people selling for $100 and 10 people buying for $100. The buyers have a choice, and for a seller to get them to pick him, he has to drop his price a little. In real life, the market is stable when one of those sellers drops his price enough that an 11th buyer decides that he now wants to buy at the lower price, or until one of the other 10 buyers decides that the price has gone too low and he's no longer interested in selling.

If the next day you bought the stock back, you are now returning the market to where it was before you sold. Assuming that everything else in the market was unchanged, you would have to pay the same price to buy the stock back that you got when you sold it. Your net profit would be zero. Actually you'd have a loss because you'd have to pay the broker's commission on both transactions.

Of course in real life the chances that everything else in the market is unchanged are very small. So if you're a typical small-fry kind of person like me, someone who might be buying and selling a few hundred or a few thousand dollars worth of a company that is worth hundreds of millions, other factors in the market will totally swamp the effect of your little transaction. So when you went to buy back the next day, you might find that the price had gone down, you can buy your shares back for less than you sold them, and pocket the difference. Or the price might have gone up and you take a loss.

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Is it better to realize the loss and buy back in at the lower price or just hold it?

I'm not a big fan of hypothetical questions. It depends on what you're trying to optimize for, i.e. taxes or total return. Most investment advisors would tell you "don't let the tax tail wag the investment dog."

There's an opportunity cost to selling with the intent to buy back in at a lower price. What if it recovers as quickly as it dropped? What if it drops further?

Time in the market generally beats timing the market. If you liked the stock at $150 and intend to hold it indefinitely, you should love it at $100 and consider buying more instead of selling.


Adding my comment to the answer:

You can't realistically assume that you're selling and buying at the same price.

Even if you did, what's the point? If you're selling/buying near instantaneously the loss will be disallowed due to the wash sale rule, which prohibits selling an investment for a loss and replacing it with the same or a "substantially identical" investment 30 days before or after the sale.

If you wait long enough, it's virtually impossible to buy back in at the same price. At a minimum, you're crossing the bid-ask spread.

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If you're asking about taxes, you'd need to specify a country. If you're in the US (based on your profile), you'd have a wash sale unless you bought the shares back more than 30 days later in which case you wouldn't be allowed to deduct the capital loss. So in the US, unless you want to exit the position and stay out for more than 30 days before buying the shares back, you're better off holding the shares.

If you are willing to stay out of the position for more than 30 days, then it can be reduced to a math problem. But you'd need to make guesses about things like what the capital gains tax rate will be when you sell, what discount rate to apply to get the present value of future cash flows, etc. And if you're thinking of holding the shares until you die, potentially you'd never owe capital gains tax...

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Reddit
reddit.com › r/stocks › should i sell at a loss if it means i can rebuy at an even lower price?
r/stocks on Reddit: Should I sell at a loss if it means I can rebuy at an even lower price?
April 26, 2021 -

For example if I buy a stock for 100 dollars, and then it tanks down to 90. Should I sell it for 90 if I could get it for 80 as it goes down?

I understand that if it goes down to 90, but never goes lower — I could be out of my money. But in theory if I sold early during a dip and rebought it again later to lower my average — is that effective?

The math confuses me sometimes, lol...

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Quora
quora.com › Can-I-sell-my-stock-for-very-low-prices-and-rebuy-it-so-that-I-wont-lose-any-stock-or-money-while-making-the-company-look-decreased-in-price
Can I sell my stock for very low prices and rebuy it so that I won't lose any stock or money while making the company look decreased in price? - Quora
Answer: Can you? It is theoritically possible. Should you? No. * To achieve the desired effect on general market price, you would need to own, then sell, a significant amount of stock in a public company; probably 5% or more in the smallest ...
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Reddit
reddit.com › r/bogleheads › probably stupid question: why not sell now and rebuy when market is down?
r/Bogleheads on Reddit: Probably Stupid Question: Why not sell now and rebuy when market is down?
November 29, 2023 -

UPDATE: Thank you for all the thoughtful and patient responses. Exactly what I needed to hear to stop obsessing and just leave the funds where they are! Thank you again!

°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°

I’m a young investor, and this is probably a super dumb question… but please educate me instead of downvoting (or at least before downvoting).

The question: why not sell my VTI now that the market is at high $220’s and rebuy when VTI is back down at $200’ish or below?

I know we cannot predict the future, but the whole time I’ve been in the market I see VTI bouncing back and forth between approximately $190 and $228. It seems reasonable to think I will be able to rebuy at $200 or lower within 6-12 months. For example, VTI was at $203 just a month ago.

Also, I’m unemployed for all of 2023, and 95% of the VTI I hold was purchased more than 12 months ago. So would I actually be on the hook for much tax when making a few K in profit under these circumstances?

If I did this, I could take the profit as a little win (I badly need a win) or I can simply reinvest and buy more shares at a lower price later.

But that all seems too easy to be true. There must be something I’m missing, please cure my ignorance, Bogleheads.

EDIT: Should also add, this VTI is in a standard brokerage account, not in 401k / IRA.

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TurboTax Community
ttlc.intuit.com › community › investments-and-rental-properties › discussion › i-sold-stock-for-a-gain-and-then-bought-the-same-stock-at-a-lower-price-on-the-same-day › 00 › 2706998
I sold stock for a gain and then bought the same stock at a lower price on the same day
April 18, 2022 - I sold stock for a gain and then bought the same stock at a lower price on the same day. It was a mistake, I meant to sell only a portion of my shares and I accidentally sold them all. This is not a wash-sale, but I did make a small gain when I re-purchased the same number of shares.
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Quora
quora.com › Is-there-a-downside-to-selling-lots-of-stock-at-high-price-and-buying-back-at-low-price
Is there a downside to selling lots of stock at high price and buying back at low price? - Quora
Answer (1 of 3): If one looks at the stock market over time, there is a small percentage of days (I think it was under 10%) that account for around 90% of the gains over 100 years in the stock market. If you own stock on those days, you do well. If you did not own stock, you missed out. The ch...
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This almost sounds like tax gain harvesting (which is similar to, but less talked about that, tax loss harvesting), where you sell shares at a profit while in a low (or 0!) tax bracket to minimize the tax you owe, and re-buy at the higher price to reset the basis so that a future sale will have a smaller gain (or even a loss), minimizing potential tax impact.

My trouble with your approach is that converting long-term gains to short-term gains is usually (or always, unless there's a special case I'm missing) undesirable. Long-term gains get preferential tax treatment; the 3 rates are 0%, 15%, and 20%, and the rate is always lower than the rate on ordinary income (which is the rate applied to short-term gains).

Let's look at an example (based on 2022 numbers): you are a Single person earning $40,000 per year, and you have $1,000 in long-term capital gains, which last year was only $500 in gains (also long term). If you sell and realize these gains this year, your income is $41,000, which means these long-term gains are taxed at 0%. Alternately, if you sold and rebought last year, your $500 gain was taxed at 0%, but when you sell now, your new $500 gain is taxed as ordinary income (12%).

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The purpose of the wash sale rule is to prevent tax loss harvesting, which defers (not eliminates) the tax benefits of losses. Technically you can also have tax gain harvesting if you expect your capital gains rate to be higher in the future, or have losses that you are willing to use to offset those gains.

As of now there is no rule against tax gain harvesting, since it benefits you somewhat but does not hurt the government. They are typically more concerned about deferring taxes than what rate you end up paying. In other words, the rules are geared towards getting tax money sooner, even if it means you get the benefit of a lower rate.

Note that it would be very unusual for long-term rates to be higher than short-term rates in different tax years, but it is plausible for you to have lower short- or long-term rates now than in the future since they are based on ordinary income brackets. So if you have an unusually low income year you might actually employ tax gain harvesting to take advantage of lower gains rates now.

Also note that wash sales are not illegal, they just defer the tax break until you ultimately close your position. You can still sell at a loss and immediately buy back, you just don't get the immediate tax benefit.

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The Motley Fool
fool.com › terms › s › stock-wash-sale-rule
Wash-Sale Rule: What It Is and How to Avoid | The Motley Fool
July 17, 2025 - A key point about wash sales is that they work out at 1:1 for each share you repurchase. Using the example above, if you repurchased 50 shares in that 30-before-to-30-after period, it would wash out 50 shares of the taxable loss. Here is how the Internal Revenue Service defines a wash sale, ...
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Reddit
reddit.com › r › stocks › comments › h07u2l › buy_low_sell_high_but_what_about_sell_high_and
r/stocks - Buy low sell high... but what about sell high and rebuy low?
June 10, 2020 - I mean that is useful if you sell and say goodbye, but if you just roll money back into the market, you're not doing anything ... Not a pro here but this would mean actually making 2 correct decisions. The sell point will go further down and the rebuy point will then go further up.
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CGAA
cgaa.org › investment strategies › sell stock and buy back at lower price strategies revealed
Sell Stock and Buy Back at Lower Price Strategies Revealed
February 8, 2025 - Selling stock and buying back at a lower price is a common strategy used by investors to minimize losses and maximize gains. This strategy involves selling stocks at a high price, holding the cash, and buying back the same stocks when the price ...
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Millswealthadvisors
millswealthadvisors.com › home › blog › if markets may decline, should i sell now and buy back …
Your Bear Market Contingency Plan - Mills Wealth Advisors
December 7, 2024 - This ensures a decent price on funds deployed after the correction. This low-risk solution helps investors buy low. This strategy capitalizes on a correction through simple, unemotional rebalancing in which we sell winning positions and buy losing positions. When a pullback occurs in stocks or real estate, our high-quality fixed income is designed not to decline, and it often rises a little as investors scramble for safety. At MWA, we have a twofold rebalancing methodology (threshold and time-based).
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Quora
quora.com › Can-you-buy-back-stock-after-selling-for-a-gain
Can you buy back stock after selling for a gain? - Quora
Answer (1 of 19): Yes, I do it all the time. If you go back through my trading history on individual stocks, ETFs or precious metals, you will see I have been in and out of some of them about 5x/year. Some 10, and some just buy, hold and collect the dividend. Or hold to wait until the investment...
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Quora
quora.com › Should-I-sell-my-stock-and-rebuy-the-same-amount-to-keep-the-original-profit-Do-I-profit-off-the-total-or-only-the-original-investment
Should I sell my stock and rebuy the same amount to keep the original profit? Do I profit off the total or only the original investment? - Quora
Answer (1 of 9): If this is a stock with a bright future let it be. Whatever profit you make you will have to pay tax on. If you do what you are proposing if you want to have the same amount of shares , because of appreciation , it will cost you that much more money to buy those shares , so you'l...
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Investopedia
investopedia.com › ask › answers › 04 › 052704.asp
Averaging Down: What It Is and When to Use It
May 30, 2025 - They add more to a good position ... Should they buy the dip? Averaging down is a strategy to buy more of an asset as its price falls, resulting in a lower overall average purchase price....