MKSI

MKS Inc. $267.31 1M -12.9% 3M -22.6% YTD +58.8% as of 2026-09-11

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Model view — historical tendencies for the days ahead, not a forecast

Next 1 day

+0.6%

Next 1 week

-0.5%

Next 1 month

-0.6%

Seasonality

Mildly negative window

Next 30 days (to Oct 14): -0.7% median, 46% of the last 26 years finished up.

20-year seasonality chart →

Mean reversion

Neutral — RSI(2) at 70

RSI(2) under 15 is oversold (this name has historically bounced); over 85 is overbought. Its dip-buy edge in history is +0.18%/day.

Mean-reversion stats →

1-month breakdown — Market · β 2.87 -0.5% · Seasonal tilt -0.2%

$353M/day volume 62% volatility +142% 1-year -40% from ATH

52-week range · 46% of the way up · -40% from the high

$110.60$447.62

Congressional trades in MKSI Full tracker →

3 members · 3 buys / 5 sells · $8K–$120K disclosed · latest filing Nov 21, 2025.

SELL	LM Lisa McClain · traded Oct 30, 2025	$1K–$15K
BUY	LM Lisa McClain · traded Oct 30, 2025	$1K–$15K
SELL	LM Lisa McClain · traded Oct 31, 2025	$1K–$15K
BUY	LM Lisa McClain · traded Aug 4, 2025	$1K–$15K
SELL	TT Thomas H Tuberville · traded Apr 3, 2023	$1K–$15K
SELL	TT Thomas H Tuberville · traded Apr 3, 2023	$1K–$15K
BUY	TT Thomas H Tuberville · traded Mar 30, 2022	$1K–$15K
SELL	NT Nicholas Van Taylor · traded Mar 25, 2019	$1K–$15K