Historically, is considered the best day to buy stocks and the worst day to sell them due to the "Monday Effect," which typically sees prices dip at the start of the week. Conversely, Wednesday and Friday are often cited as the best days for performance, with Wednesday yielding the highest average returns and Friday seeing the highest probability of a positive close. Performance Summary by Day
: Generally falls between Tuesday and Friday in performance. Friday (Best for Selling) Success Rate : Ends "green" 54.6% of the time. best and worst day of the week to buy stock
: Highest probability of a positive return, making it ideal for taking profits before the weekend. Critical Academic & Practical Considerations Historically, is considered the best day to buy
Based on 98 years of S&P 500 data (through 2026), daily performance trends typically follow these patterns: Average Return : -0.07%. Trend : Over 51% of Mondays since 1928 have finished lower. Friday (Best for Selling) Success Rate : Ends "green" 54
: Historically produces high average daily returns; often a "bounce-back" day if Monday was down. Wednesday (Strongest Returns) Average Return : 0.06%.
: Historically yields the highest average returns, often due to influential companies reporting earnings mid-week. Thursday (Moderation)
: Trading spreads and commissions often exceed the tiny percentage differences (hundredths of a percent) found in day-of-the-week trends.