Defensive strategies were breaking out into this sell-off. Here's what's been working

The Charging Bull, sometimes referred to as the Wall Street Bull, a bronze sculpture in the Financial District of Manhattan with a facemask in New York May 19, 2020.
TIMOTHY A. CLARY | AFP | Getty Images

The market sell-off that began on Friday and deepened at the start of the week may have rattled Wall Street out of a summer lull, but some investors had been gearing up for a pullback in recent weeks.

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