Below is a list of the best performing S&P 500 stocks on their earnings reaction days so far this season. Under Armour (UAA) ranks at the very top of the list with a huge one-day gain of 27.71% after it reported a triple play on October 30th. (A triple play is a company that beats EPS estimates, beats revenue estimates, and raises guidance).

Vulcan Materials (VMC) ranks second with a gain of 17.49%, followed by Akamai Tech (AKAM), Newfield Exploration (NFX), and Twitter (TWTR).Other notables on the list of big winners this earnings season include International Paper (IP), Ford (F), PayPal (PYPL), Church & Dwight (CHD), Starbucks (SBUX), General Motors (GM), Procter & Gamble (PG), DowDuPont (DWDP), and Whirlpool (WHR). These certainly aren’t your typical high-fliers!

On the downside, Mohawk (MHK) has been the worst performer this earnings season with a one-day decline of 23.86% after it reported a reverse triple play on October 25th. The stock missed EPS estimates, missed revenue estimates, and lowered guidance.

Align Tech (ALGN) ranks second worst with a one-day decline of 20.2%, followed by Western Digital (WDC), Advanced Micro (AMD), and United Rentals (URI). Other notables on the list of losers include Equifax (EFX), Fortinet (not to be confused with the video game Fortnite!), Fortune Brands (FBHS), Kraft Heinz (KHC), Kellogg (K), General Electric (GE), AT&T (T), and Amazon (AMZN).