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Personal Finance Topics / Retirement Investing
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Author: rayvt ✧  😊 😞
Number: of 767 
Subject: What % does market go up?
Date: 09/26/2025 12:51 PM
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Checking the claim that the market goes up more than it goes down in any given time period.

Using the daily close of the S&P 500 from 1/3/1950 to 9/25/2025. 75 years.

Price only,without dividends:
# days in period:    1         2         5         20        60        125       250     1250
Period:             Daily     2 day     week      month     quarter   semiann   annual    5 yr
# with gain:        10119     5199      2184      602       218       105       55        11
Total #:            19053     9526      3810      951       316       151       75        14
Pct with Gain:      53%       55%       57%       63%       69%       70%       73%       79%

Incl dividends:
Pct with Gain:      54%       56%       59%       65%       72%       75%       77%       86%

Conclusion:
For any period of a month or longer, the market goes up about 2/3 of the time.
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