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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteA 200-day moving average is a smoothed reference for a security’s recent price trend: it compares the current price with the average of its previous 200 daily observations, usually trading sessions. Price above or below that line describes where it stands relative to past prices; neither position nor a crossover predicts what happens next.
What does the 200-day moving average tell you?
A simple moving average (SMA) adds the prices in a chosen window and divides by the number of observations. Each observation counts equally. On a daily stock chart, a 200-day SMA uses the latest 200 daily price observations—ordinarily trading sessions, not 200 calendar days—and rolls forward as new prices arrive. The Federal Reserve Bank of Boston describes moving averages as a way to smooth historical price trends and filter volatile daily movements.
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If the current price is above its 200-day average, it is higher than that trailing average; if below, it is lower. Chart readers often describe those positions as the stronger or weaker side of the reference. That is a description of price action, not a measure of a company’s earnings, balance sheet, or fundamental value, and it is not by itself a buy or sell instruction.
How it differs from an exponential moving average
An exponential moving average (EMA) gives more weight to recent observations, so it responds faster to new prices than an SMA. The SMA’s equal weighting makes it a slower-moving summary. Neither approach is universally best; they emphasize different aspects of the price series. Fidelity explains the distinction between simple and exponential moving averages.
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Is it bullish when a stock is above its 200-day moving average?
Some traders treat a price above the line as evidence that the longer-term price trend is stronger, and a price below it as evidence of weakness. Those are conventions for reading a chart, not conclusions about future returns. A stock can be above its average while its business deteriorates, or below it while its prospects improve. The line records past prices; it does not establish whether a security is cheap, expensive, healthy, or likely to rise.
The average also moves only after its underlying observations change. Following a sharp reversal, it can lag the new direction. In a sideways market, price may cross the line repeatedly, producing whipsaws rather than a clear sustained trend. The Boston Fed cautions: “However, this simple tool can often be misleading because of its dependence on trending markets and its inability to capture quick market turns.”
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What do Golden Cross and Death Cross mean?
These labels refer to one moving average crossing another, rather than price crossing the 200-day line:
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- Golden Cross: a shorter-term average, commonly the 50-day SMA, crosses above the 200-day SMA. Market participants commonly regard it as bullish.
- Death Cross: the 50-day SMA crosses below the 200-day SMA. Market participants commonly regard it as bearish.
The names summarize a chart condition; they do not establish that prices will keep moving in that direction. As Fidelity notes, technical analysis is reactive and probability-based, not a guarantee. A crossover can occur after much of a move has already happened, and it can be followed by a reversal or further sideways trading.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Does the 200-day moving average predict the market?
No. It is calculated from historical prices, so it cannot identify an exact future turning point or reliably foretell a crash or rebound. Its possible use is as a reference for describing trend conditions—not as a standalone prediction or a level that must act as support.
Historical tests can ask whether a particular rule would have performed well under specified conditions. They cannot prove that the same result will recur. Results depend on the asset and sample period, how the rule is defined, how often signals are checked, and whether trading costs and fees are included.
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What historical studies show
A 2013 peer-reviewed study by Clare, Seaton, Smith, and Thomas tested technical rules on the S&P 500, including a popular 200-day moving-average rule. Its abstract reports that the tested rules beat passive long-only investment in the historical sample and that monthly end-of-month decisions performed better than more frequent decisions. It does not provide a single effect-size figure for the reported outperformance, and its findings are not a universal forecast. Read the study record and abstract.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesA 2022 CFA Institute article by Horstmeyer, El Boury, and Hardin reports average daily returns of 0.16% in the 1970s to 0.29% in the 1980s for a historical 200-day moving-average long-short portfolio. These are decade-specific figures from the article’s historical analysis, not expected returns today or an individual investor’s achievable net return. The figures are before transaction costs and fees, as clarified in a comment on the article page; the article also discusses risk and volatility. See the CFA Institute article.
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How to use the line without overreading it
- Check what is being averaged: an SMA weights each observation equally; an EMA gives more weight to recent prices.
- Read “above” and “below” literally as comparisons with a trailing average, not as valuations or forecasts.
- Consider the price pattern around the line. Repeated crossings in a sideways market can make any single crossing less informative; after a fast reversal, the average may lag.
- Treat crossover names as descriptions used by chart readers, not guaranteed trading signals.
- Keep chart-based trend information separate from fundamental analysis and from any personal investment decision.
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