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MRK.NYSE
Merck &
Health Care · Pharmaceuticals

Global healthcare company providing medicines and vaccines for oncology, vaccines, hospital acute care, and animal health including Keytruda.

HQ: United StatesListed: United States

Historical AI Opinions

Audit every published iPulse AI forecast batch and immutable historical research document for Merck &.

Merck & Co., Inc. (MRK.NYSE) AI OPINIONS & ADVISOR ANALYSIS

Read and compare the 14 individual AI Advisor deep-dive reports, including their forecast paths, ratings, price targets, and reasoning.

Updated on 20 September 2026Deep analysis 20 September 2026

25 min readAudit All Past Forecasts

1. Investment Thesis — Base Case

The central tension is simple and uncomfortable: Merck has bought a credible bridge across the 2028 cliff, but investors have already paid for the crossing. The 2026 re-rating from roughly 9x to 17x forward happened on flat underlying earnings, financed by defensive rotation under a tightening Fed rather than by improved fundamentals. The base case therefore projects a stock that drifts lower into the February 2027 CMS decision, grinds sideways through the pre-cliff years, troughs in early 2029 as the first post-biosimilar guidance lands, then recovers as Lipfendra, Winrevair, Ohtuvayre and the acquired pipeline rebuild the base. Total five-year price appreciation is modest; the dividend does most of the work.

  • Underlying 2026 near $8.60 after adding back $5.93 of Terns and Cidara charges [3][4].
  • At $147 that is roughly 17x, versus about 9x forward eleven months earlier at $86 [5].
  • A $363bn market cap plus roughly $50bn implies about 15x normalised near $27bn [6].

Historical prices and published forecast

Historical prices and published forecastObserved prices and the selected advisor's published projection share a split-adjusted price basis. Prices after the forecast start are later observations, not information known at publication. Forecasts are uncertain. Values in USD.63.3289.07114.82140.57166.32Sep 2021Mar 2024Sep 2026Mar 2029Sep 2031Forecast starts
  • Observed price
  • Published advisor forecast
Observed prices and the selected advisor's published projection share a split-adjusted price basis. Prices after the forecast start are later observations, not information known at publication. Forecasts are uncertain. Values in USD.
View chart values
Historical prices and published forecast — published chart values
SeriesDateValue (USD)
Observed price2021-09-1671.9
Observed price2021-10-0980.3
Observed price2021-10-1578.5
Observed price2021-11-0188.6
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Observed price2022-01-0478.7
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Observed price2025-06-1381.7
Observed price2025-07-0680.7
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Observed price2025-09-0285.5
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Published advisor forecast2026-09-18147
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Published advisor forecast2027-03-18135
Published advisor forecast2027-06-18139
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Published advisor forecast2028-03-18136
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Published advisor forecast2031-03-18150
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Published advisor forecast2031-09-18158

2. Scenarios & Signals

Bull case

The bull case activates if CMS softens the subcutaneous rule and Qlex conversion runs past half the franchise before December 2028. Retained oncology revenue then funds an uninterrupted buyback, the 2029 earnings trough never materialises, and Lipfendra plus Winrevair push non-Keytruda revenue through $25bn. At that point the market stops applying a cliff discount and re-rates Merck as a diversified , making today's 17x look like the entry multiple rather than the exit multiple.

Bear case

The bear case activates when the February 2027 CMS list confirms subcutaneous inclusion and biosimilar erosion then exceeds 60% of US Keytruda within eighteen months. Guidance resets, the buyback is curtailed to protect a stretched carrying roughly $50bn of , and the defensive rotation premium unwinds simultaneously as disinflation returns capital to growth. Flat earnings at 17x become falling earnings at 12x — a compounding repricing, not a single derating, and a multi-year drawdown for holders.

Current crowd narrative

The settled belief is that the Keytruda cliff is fully discounted and that 2026's dealmaking bought the bridge. Twenty-eight analysts average $152.96 with a Buy consensus; Wells Fargo moved to $170 [17]. The anchoring error is the October 2025 price of $86 — anything above it feels like vindicated value, disguising the fact that flat earnings now carry a 17x multiple [5].

Alpha-gap assessment

The crowd overestimates these shares modestly. The decisive overlooked evidence is that the entire 2026 move is , not earnings: strip out $5.93 of Terns and Cidara charges and 2026 underlying is roughly $8.60 against $8.98 in 2025 [3][4]. Investors are paying 17x a flat, pre-cliff earnings stream whose largest component faces in December 2028 [9], while consensus revenue growth of 2.8% annually lags the industry's 9.1% [19]. The valuation assumes a bridge that is real but not yet load-bearing.

Convergence catalyst

The CMS selected-drug list due by February 1, 2027 is the trigger [9]. Including subcutaneous Keytruda removes the evergreening defense and forces analysts to rebuild 2029-2030 models on negotiated pricing. The first observable sign of repricing will be sell-side franchise forecasts cut before the rule is even finalised.

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