Day Trading
Quick Definition
Buying and selling securities within the same trading day to profit from short-term price movements.
Key Takeaways
- Day traders open and close all positions within the same session—no overnight holds.
- The PDT rule requires $25,000 minimum equity for frequent day traders in margin accounts.
- Research shows most retail day traders lose money; strict risk management is essential.
What Is Day Trading?
Day trading is a strategy where a trader opens and closes all positions within a single market session, holding no overnight exposure. Day traders use technical analysis, level-2 quotes, real-time news, and algorithmic tools to capture small intraday price movements. The SEC's Pattern Day Trader (PDT) rule requires traders who execute four or more day trades in five business days (in a margin account) to maintain a minimum equity of $25,000. Day trading is extremely competitive: studies consistently show that the vast majority of retail day traders lose money over time. Transaction costs, slippage, and emotional decision-making erode returns. Successful day traders typically have strict risk management rules, including stop-losses on every trade, position-size limits, and daily loss caps.
Day Trading Example
- 1A day trader buys 500 shares of Tesla at $240 at 10 AM and sells at $244 by noon, pocketing $2,000 before fees.
- 2Under the PDT rule, a trader with a $15,000 account is restricted to three day trades per rolling five-day period.
Related Terms
Swing Trading
A trading style that aims to capture short- to medium-term price movements over several days to weeks, using technical and fundamental analysis.
Pattern Day Trader
A trader who executes four or more day trades within five business days in a margin account, triggering a $25,000 minimum equity requirement.
Stock
A security representing ownership in a corporation, entitling the holder to a share of profits and voting rights.
Initial Public Offering (IPO)
The first sale of a company's stock to the public, transitioning it from private to publicly traded.
NASDAQ
The National Association of Securities Dealers Automated Quotations — the second-largest stock exchange globally, known for its concentration of technology and growth companies.
S&P 500
A market-capitalization-weighted index tracking 500 of the largest U.S. publicly traded companies, widely considered the best single gauge of the American stock market.
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