Shares of First Data Corp. are up 5% in premarket trading Monday after Goldman Sachs analyst James Schneider upgraded the stock to buy from neutral. "Although First Data's fundamentals have been choppy, we believe revenue growth is poised to improve," he wrote. "Acquisitions should bolster client retention and boost headline growth." First Data recently acquired CardConnect and BluePay, which Schneider said would triple the company's exposure to sales coming from independent software vendors. Schneider also sees the potential for stabilization in the company's joint ventures in the second half of the year. He raised his price target to $25 from $19. First Data shares have gained 7.7% over the past 12 months, while the S&P 500 has gained 14%.