Recent 6.8% pullback isn't enough to hurt long-term MKS Instruments (NASDAQ:MKSI) shareholders, they're still up 74% over 5 years

Long-term investing aims to profit, with MKS Instruments' stock up 13% in a year but lagging behind the market. Despite earnings per share decline, revenue growth indicates potential. Insiders' purchases are positive, but future earnings crucial for shareholder returns.