MasterCard (MA) has recently been on Zacks.com's list of the most searched stocks. Therefore, you might want to consider some of the key factors that could influence the stock's performance in the near future.Over the past month, shares of this processor of debit and credit card payments have returned +3.7%, compared to the Zacks S&P 500 composite's -6.5% change. During this period, the Zacks Financial Transaction Services industry, which MasterCard falls in, has lost 2.5%. The key question now is: What cou ...