Past patterns don't predict future events. However, in March 2008 $SPX hit -3σ (-17.8% from its high) and bounced up to its yearly mean μ in May. It then dropped -53% over ten months. Currently, $SPX is approaching the same μ threshold after bouncing up off -3σ March 23. $SPY https://t.co/oL1iXe6dTC