Analysis conducted by Schroders Plc shows that, after big single-day drops, 12-month S&P 500 returns have been mostly positive, according to a recent article in Bloomberg.

The study reflects that, after the largest one-day stock market declines over the past 30 years, the U.S. market returned an average of 25 percent in the 12 months after the decline. In the five years following the same declines, average returns were about 14 percent, the study shows.

According to Andrew Oxlade, head of editorial content at Schroders, “The data underlines the strength of equities over the long-term. But the scattering of dates, notably the lack of sharp stock-market falls since 2011, also reflects the relative calm investors have enjoyed in recent years, and particularly in the last 18 months.”