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    MKS (MKSI) Could Be 48% Undervalued On Its AI Growth Narrative

    Simply Wall St·10/20/2026 11:32:12
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    MKS (MKSI) has drawn investor attention after recent trading left the share price at US$215.41. Performance over the past month and past three months has shown double digit declines, despite stronger annual return figures.

    The recent slide, including a 14.6% 30-day share price decline and a 37.6% drop over 90 days, sits awkwardly alongside a 27.9% year-to-date share price gain and a much stronger 52.8% one-year total shareholder return. This suggests that momentum has cooled, even as longer-term holders have still seen sizable value created.

    Scan beyond MKS and pressure-driven semis volatility by reviewing a curated group of resilient chip and hardware players in the 32 resilient stocks with low risk scores.

    That kind of whiplash in MKS raises a simple question: Are you seeing the market reassess the business, or just sentiment resetting, and has the recent slide already been priced into today’s valuation?

    Most Popular Narrative: 48% Undervalued

    MKS last closed at $215.41 while the most followed thesis anchors on a fair value around $410.86. This frames the recent selloff as a valuation reset inside a still supportive long term story driven by AI demand and recurring revenue.

    The deepening integration of advanced materials and chemistry equipment within MKS, supported by record chemistry equipment orders for several quarters and a rising share of AI related chemistry revenue, increases the opportunity for tools plus consumables cross selling and can support both revenue growth and higher gross margins.

    See why 16 investors see MKS as 48% undervalued.

    Result: Fair Value of $410.86 (UNDERVALUED)

    Still, the bullish MKS story can crack if AI related spending cools, or if new Malaysia and Guangzhou capacity ramps more slowly and pressures margins.

    Find out about the key risks to this MKS narrative.

    Next Steps

    Mixed feelings about MKS so far. If you want to move fast and judge the balance of red flags and bright spots for yourself, start with the 4 key rewards and 1 important warning sign.

    Looking for more investment ideas beyond MKS?

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