Toast (TOST 15.96%) stock is posting big gains Friday trading. The fintech company's share price was up 15.3% as of 2 p.m. ET, according to data from S&P Global Market Intelligence. Toast stock is gaining ground following the publication of the company's fourth-quarter earnings results. While the company's sales for the period fell short of the market's target, earnings came in better than expected. The company also announced it would be reducing expenses by trimming its workforce. Sales and margins were st ...