ERX shares outstanding have substantially increased during the crude oil sell-off as traders tried to catch a falling knife and timed a market bottom. ERX added $50.1 million in net inflows year-to-date.

The more focused S&P Oil & Gas Exploration & Production Bull Shares (NYSEArca: GUSH) has also been outperforming, rising 16.8% over the past week. Oil and gas explorers and producers have been among the worst performers in the recent energy rout, and they also experienced the strongest rebound on the recent rally in oil prices.

LABU shares outstanding have also substantially increased over the course of the correction in the biotechnology sector. Biotechs have yet to rebound along with the broader market. LABU saw $151.3 million in inflows so far this year.

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