: The "Monday Effect" was significantly more pronounced in the 1980s and 1990s but has weakened as markets become more efficient and technology allows for 24/7 news consumption.
: Trading spreads and commissions often exceed the tiny percentage differences (hundredths of a percent) found in day-of-the-week trends. best and worst day of the week to buy stock
: Patterns shift during bear markets, where Mondays and Tuesdays may experience the highest volatility and steepest drops. : The "Monday Effect" was significantly more pronounced
While these historical patterns exist, modern research and platforms like Investopedia and Yahoo Finance suggest several caveats: best and worst day of the week to buy stock