Liquidity. It's all about liquidity. Someone folks decided to sell, not enough buyers.. price went down.. market makers and some traders sold as a hedge against falling prices... price found support from buyers, traders like myself jumped in and bought it and driving up the price. PS: I sold the newly purchased WMC i bought at $21.09 at $21.90 today. I will buy it back if we get another pullback. I still own 500 shares of WMC.