Kensho Trade: Buyback party may be over

NYSE Trader on the floor
Brendan McDermid | Retuers
NYSE Trader on the floor

The market has rebounded by a double-digit percentage since the February lows. Many factors such as the bounce in oil and the Federal Reserve's dovish signal helped, but there may be another force at work — share buybacks.

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Using data from Kensho, a tool designed to quantify historical market events, CNBC Pro analyzed the impact of stock buyback seasonality on market returns.