MKSI showed a exceptionally consistent uptrend over the past 52 weeks (analysis frame: 52w/5w), scoring an R² of 0.9541. R² measures how closely the price followed a straight logarithmic trend line — a score of 1.0 represents a perfectly linear rally with no deviation. The stock gained 350.6% over the lookback period, equivalent to an annualised return of 350.6%. As of week 2026-W16, MKSI last traded at $269.89. Momentum modelling projects a exceptional continuation: the statistical exit target (Exit B, k=0.75σ) is +13.3% ($305.83) by May 23, 2026, with a stop-loss level at -13.3% ($233.95). This analysis was generated by StraightR, a momentum screening tool that ranks US equities by the linearity of their logarithmic price trend across multiple lookback frames (26w, 40w, 52w, 78w).