Investors might want to bet on MasterCard (MA) , as it has been recently upgraded to a Zacks Rank #2 (Buy). An upward trend in earnings estimates -- one of the most powerful forces impacting stock prices -- has triggered this rating change.A company's changing earnings picture is at the core of the Zacks rating. The system tracks the Zacks Consensus Estimate -- the consensus measure of EPS estimates from the sell-side analysts covering the stock -- for the current and following years.The power of a changing ...

MasterCard (MA) closed the most recent trading day at $562.03, moving -4.62% from the previous trading session. This move lagged the S&P 500's daily loss of 1.13%. Elsewhere, the Dow lost 1.79%, while the tech-heavy Nasdaq lost 1.3%. The processor of debit and credit card payments's shares have seen an increase of 1.22% over the last month, surpassing the Business Services sector's gain of 0.81% and falling behind the S&P 500's gain of 3.55%.The investment community will be closely monitoring the performanc ...