Why do stocks spike after hours?

Asked by: Yasmeen Hoeger DDS  |  Last update: July 1, 2025
Score: 4.1/5 (30 votes)

After the opening bell But when news breaks outside of trading hours, an imbalance between buy and sell orders may cause a stock to open dramatically higher or lower than its price at the previous close. Stocks hit by negative news can "gap lower," and open at a price far below the prior day's close.

Is it good if a stock goes up after hours?

Pre-market and after-hours trading may be beneficial to investors looking to capitalize on business developments or events. However, there are significant liquidity-related risks to consider. It's a good idea to avoid extended hours trading unless you have a well-defined strategy in place.

What is the 10am rule in stocks?

Some traders follow something called the "10 a.m. rule." The stock market opens for trading at 9:30 a.m., and there's often a lot of trading between 9:30 a.m. and 10 a.m. Traders that follow the 10 a.m. rule think a stock's price trajectory is relatively set for the day by the end of that half-hour.

What time of day do stocks rise the most?

The opening and closing hours of the trading day tend to be the most volatile and active periods. When U.S. markets open at 9:30 a.m. Eastern time, it processes all events and news releases since the previous day's close, which can create significant price swings.

Why do stocks rise over time?

High demand is the primary driver of what makes a stock price go up. The higher the demand, the higher the price investors will be willing to pay for each share (and the higher the price owners will be demanding to sell their shares).

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18 related questions found

What causes stocks to move after hours?

Why Can Stocks Be So Volatile in After-Hours Trading? Lower trading volume and less liquidity results when fewer traders and investors are in the market. This causes wider bid-ask spreads and, in turn, greater stock price volatility.

Why do stocks go up over night?

Stock prices spike because there aren't enough large brokerages ready and willing to sell the in-demand stock based on limited information early in the day.

What is the 11am rule in trading?

The 11 a.m. trading rule is a general guideline used by traders based on historical observations throughout trading history. It stipulates that if there has not been a trend reversal by 11 a.m. EST, the chance that an important reversal will occur becomes smaller during the rest of the trading day.

What is the 3 day rule in stocks?

In short, the 3-day rule dictates that following a substantial drop in a stock's share price — typically high single digits or more in terms of percent change — investors should wait 3 days to buy.

How to spot stocks before they spike?

Here are seven ways to identify and profit from potential breakout stocks.
  1. Look for companies with a competitive advantage. ...
  2. Watch for key market trends. ...
  3. Monitor volume and price. ...
  4. Identify companies with strong fundamentals. ...
  5. Track a stock's relative strength. ...
  6. Keep an eye out for catalysts. ...
  7. Exit at your target price. ...
  8. Bottom line.

What is the 3-5-7 rule in stocks?

The 3 5 7 rule works on a simple principle: never risk more than 3% of your trading capital on any single trade; limit your overall exposure to 5% of your capital on all open trades combined; and ensure your winning trades are at least 7% more profitable than your losing trades.

What is the 120 rule in stocks?

The Rule of 120 (previously known as the Rule of 100) says that subtracting your age from 120 will give you an idea of the weight percentage for equities in your portfolio. The remaining percentage should be in more conservative, fixed-income products like bonds.

How to catch big moves in stocks?

Focus on trading the stocks at the bottom and top of the list, when sorted by Change from Open. These are the stocks with the biggest price moves since the open, both to the upside and downside. Go through some of the ones at the top and bottom of the list, and watch for trade setups.

Is it bad to buy stocks at all-time highs?

Investing after the market reaches an all-time high has historically been profitable. If you've been sitting on the sidelines watching the stock market claw its way back from the 2022 bottom to new all-time highs, you may be asking yourself if you've missed your opportunity. Maybe not.

Why do shares drop after hours?

After the opening bell

Buyers and sellers can balance each other out, creating a kind of equilibrium. But when news breaks outside of trading hours, an imbalance between buy and sell orders may cause a stock to open dramatically higher or lower than its price at the previous close.

Is it legal to buy and sell the same stock repeatedly?

There are no restrictions on placing multiple buy orders to buy the same stock more than once in a day, and you can place multiple sell orders to sell the same stock in a single day. The FINRA restrictions only apply to buying and selling the same stock within the designated five-trading-day period.

Why do day traders need 25k?

Why Do I Have to Maintain Minimum Equity of $25,000? Day trading can be extremely risky—both for the day trader and for the brokerage firm that clears the day trader's transactions. Even if you end the day with no open positions, the trades you made while day trading most likely have not yet settled.

What is the 5-3-1 rule in trading?

The numbers five, three, and one stand for: Five currency pairs to learn and trade. Three strategies to become an expert on and use with your trades. One time to trade, the same time every day.

What is the best timeframe for trading?

One to two hours of the stock market being open is the best time frame for intraday trading. However, most stock market trading channels open from 9:15 am in India. So, why not start at 9:15? If you are a seasoned trader, trading within the first 15 minutes might not be as much of a risk.

Why do stocks always drop in the morning?

The reason for this is that all significant market news for the day is factored into the stock price first thing in the morning. So, when it comes to trading stocks, the early bird often catches the worm. All this activity often makes the first one or two hours of a day – or even the first 15 minutes – more volatile.

How to predict if a stock will go up or down?

If more people want to buy a stock (demand) than sell it (supply), then the price moves up. Conversely, if more people wanted to sell a stock than buy it, there would be greater supply than demand, and the price would fall.