I noted back in 2007, during a similar period of frustration, that less than half of
the typical bull market gain is retained by the end of the subsequent bear market - «Once stocks become richly valued, the remaining gains achieved by the market are almost always purely speculative - they are generally erased over the remaining course of the market cycle.
Historically, that puts
the typical bull market gain at about 152 % from trough - to - peak, followed by a bear market decline about 34 % from peak - to - trough, for a cumulative full - cycle total return of about 67 % (roughly 10.7 % annualized).