MKS Instruments, Inc. (NASDAQ:MKSI – Get Free Report)’s stock price traded down 3.8% on Wednesday . The stock traded as low as $115.82 and last traded at $115.94. 163,387 shares traded hands during trading, a decline of 74% from the average session volume of 632,673 shares. The stock had previously closed at $120.48. Analyst Upgrades […]