MKSIMKS Inc.

$264.42+106% 1Y
Latest close: back above its 200-day averageOct 9, 2026what changed →

What is the market doing?

Mixed

No clear lean: rangebound and insiders net selling (often routine).

3 neutral
TrendRangeboundderived · Oct 9, 2026

Choppy, but holding above its 200-day average. Price is +1% vs its 200-day average.

Insider conviction−$3.2M (90 days to Oct 8, 2026)SEC EDGAR · Oct 8, 2026

Insiders were net sellers over the 90 days ending Oct 8, 2026; selling is often routine (taxes, diversification).

Short interest8.5% of sharesFINRA · Sep 15, 2026

Heavily shorted, settled Sep 15, 2026, about a week of normal trading to cover. Down 2.9% since the previous count, up from 6.5% of shares outstanding three months ago.

Against the whole market›

Percentile against every name Ryufin tracks. Higher is better; the tick marks the middle of the market. Context, not one of the checks above.

1-year returntop 7% of the market
vs 200-day avgmiddle of the market

Where this answer is blind. Insider selling is often routine (taxes, diversification); only cluster buying is a strong tell.

How MKSI is trading

MKS Inc. is +106% over the past year while the S&P 500 is +18%: 88 points ahead of the market.

+106%

1-year return · S&P 500 +18%

vs 200-day average
+0.81%

vs 200-day average · close to trend

RSI (14)
56

RSI (14) · neutral

Below its 52-week high
37%

Below its 52-week high

Sep 18, 2024$58.31 – $420.56 · dashed line: 200-day averageOct 9, 2026
Details›
Last close2026-10-09
$264.42
1 monthS&P 500 +2.7%
+1.0%
1 yearS&P 500 +18%
+106%
5 yearsS&P 500 +88%
+81%
vs 50-day average$274.04
−3.5%
52-week high
$420.56
52-week low
$120.87
Annualised volatility
59%
Insider buying, net, 6 monthsForms 3/4/5 to 2026-10-08
−$7.3M
Calendar-year price return
YearReturn
2026 (year to date)+66%
2025+54%
2024+2.2%
2023+23%
2022−51%
2021+16%
2020+38%
2019+72%
2018−31%
2017+60%
Average return by calendar month, 2016–2026
MonthYearsPositiveAverage
Jan108 of 10+12%
Feb105 of 10+0.35%
Mar105 of 10−0.46%
Apr103 of 10−0.91%
May109 of 10+6.7%
Jun106 of 10+2.3%
Jul116 of 11+1.5%
Aug112 of 11−4.1%
Sep116 of 11−0.13%
Oct114 of 11+0.61%
Nov108 of 10+8.8%
Dec108 of 10+3.2%

End-of-day closes from IEX; the S&P 500 comparison uses SPY over the same window. Prices are a reference point, not a basis for trading decisions.