Big stock market shocks aren't scaring investors anymore

Business Insider

Published May 23, 2017 11:31PM ET

Updated May 24, 2017 09:23AM ET

Big stock market shocks don't scare investors anymore. In fact, swift declines are welcomed with open arms.

Traders have been taking advantage of share weakness to "buy the dip," or expand positions by purchasing shares at a discount. And that's helped the equity market recover from short-term selloffs faster than ever before.

The dynamic was on display just last week, when the S&P 500 fell 1.8% in a single day, which marked a five-standard-deviation move. The index recovered 85% of that loss over the following three days, the second-fastest retracement of a loss that big in S&P 500 history, according to data compiled by Bank of America Merrill Lynch (NYSE:BAC).

Further, the last three times the benchmark has absorbed a decline of similar magnitude, it's taken no more than nine days for it to make up the vast majority of the loss, BAML data show.

"Market shocks have come to be viewed by investors as alpha opportunities rather than marking the onset of rising uncertainty," a group of equity analysts from BAML wrote in a client note. "Initially, a clearly visible and high strike Fed put taught the market to buy the dip. Now, however, this behaviour has simply become a learned response function."