MKSI
MKS Instruments Inc. Technology - Semiconductor Equipment Investor Relations →
MKS Instruments Inc. (MKSI) closed at $242.96 as of 2026-02-02, trading 128.7% above its 200-week moving average of $106.23. The stock moved further from the line this week, up from 122.9% last week. With a 14-week RSI of 86, MKSI is in overbought territory.
Over the past 1353 weeks of data, MKSI has crossed below its 200-week moving average 26 times. On average, these episodes lasted 19 weeks. Historically, investors who bought MKSI at the start of these episodes saw an average one-year return of +6.7%.
With a market cap of $16.3 billion, MKSI is a large-cap stock. The company generates a free cash flow yield of 3.5%. Return on equity stands at 11.2%. The stock trades at 6.3x book value.
Share count has increased 21.4% over three years, indicating dilution.
Over the past 26 years, a hypothetical investment of $100 in MKSI would have grown to $586, compared to $729 for the S&P 500. MKSI has returned 7.0% annualized vs 7.9% for the index, underperforming the broader market over this period.
Free cash flow has been declining at a -9.5% compound annual rate. A deteriorating cash flow trend warrants extra scrutiny — the stock may be cheap for a reason.
Growth of $100: MKSI vs S&P 500
Monthly data normalized to $100 at start. Vertical dashed lines mark 200-week MA touches.
What Happens After MKSI Crosses Below the Line?
Across 26 historical episodes, buying MKSI when it crossed below its 200-week moving average produced an average return of +8.3% after 12 months (median +2.0%), compared to +6.3% for the S&P 500 over the same periods. 50% of those episodes were profitable after one year. After 24 months, the average return was +14.8% vs +14.4% for the index.
Each line shows $100 invested at the moment MKSI crossed below its 200-week MA. Bold blue = stock average. Gray dashed = S&P 500 average over same periods.
Historical Touches
MKSI has crossed below its 200-week MA 26 times with an average 1-year return of +6.7% after recovery.
| Crossed Below | Recovered | Weeks | Max Depth | 1-Year Return | Return Since Touch |
|---|---|---|---|---|---|
| Jul 2000 | Aug 2000 | 4 | 36.0% | +1.4% | +1130.4% |
| Sep 2000 | Apr 2001 | 31 | 46.4% | -35.2% | +981.5% |
| Jun 2001 | Dec 2001 | 27 | 39.8% | -25.5% | +1087.6% |
| Jan 2002 | Feb 2002 | 6 | 8.4% | -31.7% | +1103.0% |
| Jun 2002 | Aug 2003 | 63 | 60.7% | -23.0% | +1062.4% |
| Sep 2003 | Oct 2003 | 5 | 13.6% | -32.8% | +1228.3% |
| Apr 2004 | May 2004 | 6 | 12.6% | -33.9% | +1256.9% |
| Jun 2004 | Jan 2006 | 82 | 40.1% | -18.9% | +1264.4% |
| Jul 2006 | Jul 2006 | 2 | 4.4% | +41.8% | +1484.1% |
| Aug 2006 | Aug 2006 | 1 | 0.9% | +21.1% | +1467.3% |
| Jul 2007 | Aug 2007 | 1 | 0.1% | +1.7% | +1331.0% |
| Sep 2007 | Feb 2008 | 24 | 18.2% | +7.3% | +1372.3% |
| Jul 2008 | Jul 2008 | 1 | 0.5% | -3.9% | +1356.3% |
| Sep 2008 | Apr 2010 | 81 | 40.9% | -5.8% | +1355.6% |
| May 2010 | Jun 2010 | 6 | 3.4% | +37.5% | +1412.9% |
| Jun 2010 | Jul 2010 | 3 | 7.0% | +47.5% | +1505.6% |
| Aug 2010 | Oct 2010 | 9 | 10.2% | +23.7% | +1481.6% |
| Dec 2018 | Dec 2018 | 1 | 7.0% | +91.4% | +332.5% |
| Mar 2020 | Apr 2020 | 3 | 8.5% | +131.9% | +239.6% |
| Apr 2022 | May 2022 | 3 | 3.0% | -27.3% | +119.0% |
| May 2022 | May 2022 | 1 | 0.3% | -24.8% | +113.5% |
| Jun 2022 | Aug 2022 | 8 | 18.6% | -9.6% | +122.4% |
| Aug 2022 | Feb 2024 | 77 | 44.2% | -14.7% | +130.4% |
| Apr 2024 | Apr 2024 | 2 | 10.5% | -40.6% | +127.7% |
| Jul 2024 | Jan 2025 | 24 | 16.4% | -12.2% | +130.8% |
| Jan 2025 | Sep 2025 | 32 | 46.3% | +109.6% | +116.3% |
| Average | 19 | — | +6.7% | — |
Not financial advice. This is an educational tool. Past performance does not guarantee future results. Do your own research before making investment decisions.
Data as of Friday close, 2026-02-02