The stock market was volatile on Monday, initially pushing higher but giving up ground over the course of the day. Monday afternoon, it was Arista Networks (NYSE: ANET) and Take-Two Interactive Software (Nasdaq: TTWO) that were on display, and like some of their peers, both stocks moved lower following their financial releases. Shares of Arista Networks fell almost 1% in the regular session on Monday, and then added a further decline of more than 1% after hours.