timing the market is difficult at the best of times for even the most experienced traders now bank of america has quantified just how large the missed opportunity can be for investors who try to get in and out at just the right moment looking at data going back to 1930 the firm found that if an investor missed the sp 500s 10 best days each decade the total return would stand at 28 if on the other hand the investor held steady through the ups and downs the return would have been 17715 when stocks plunge a natural impulse can be to hit the sell button but the firm found the markets best days often follow the biggest drops so panic selling can significantly lower returns for longerterm investors by causing them to miss the best days remaining invested during turbulent times can help recover losses following bear markets  it takes about 1100 trading days on average to recover losses after a bear market noted savita subramanian head of us equity and quantitative strategy at bank of america sometimes as happened in 2020 the recovery is much faster the data comes amid a boom in retail traders trying to find the next tesla or gamestop pop and as fast datadriven strategies become more prevalent across wall street but bank of america noted simple investing for the long term can be a recipe for loss avoidance given that 10year returns for the sp 500 have been negative just 6 of the time since 1929 of course the data also shows the astronomical returns for any investor who correctly called the ten worst days of each decade to the tune of 3793787 additionally excluding the 10 worst and best days would have registered a gain of 27213 but given the difficulty of precisely calling the peaks and troughs the better bet is to simply stay in invested bank of america noted that factors including positioning and momentum typically outperform over the shortterm but fundamental analysis wins over multiple years whereas valuations explain very little of returns over the next one to two years they have explained 6090 of subsequent returns over a 10year time horizon the firm noted we have yet to find any factor with such strong predictive power for the market over the short term looking ahead subramanian envisions more muted returns or about 2 per year for the sp 500 over the next decade including dividends returns stand at 4 the forecast is based on a historical regression looking at todays price relative to normalized earnings ratio the firm added that over prior periods of similar returns including between 1964 and 1974 as well as from 1998 to 2008 there was a higher probability of loss pointing to the merits of staying invested for the long haul