Najarian: Buy the regional banks

Bank
Adrian Assaive | E+ | Getty Images

CNBC "Halftime Report" trader Jon Najarian purchased shares of a regional bank sector ETF on Wednesday after spotting unusual options activity.

The SPDR S&P Regional Banking ETF (KRE) provides exposure to track the equities in the S&P Regional Banks Select Industry Index.

Here's why Najarian bought it here.