MKS Stock PerformanceMKSI stock traded down $21.79 during trading on Thursday, hitting $291.31. MKS dividend announcementMKS declared a quarterly dividend of $0.25 per share, or $1.00 annualized, although the approximately 0.3% yield is unlikely to be a major stock-price catalyst. MKS earnings and insider trading dataRecent data shows extensive insider selling: 40 reported insider sales and no purchases over the past six months. Negative Sentiment: At a valuation of roughly 61 times earnings, MKS carries high expectations. Insider Buying and SellingIn other news, CFO Ramakumar Mayampurath sold 8,810 shares of MKS stock in a transaction dated Friday, May 22nd.