Has Buying Thermo Fisher Stock At A High Paid Off?
Market wisdom dictates buying low and avoiding the peak. Yet Thermo Fisher Scientific (TMO) stock closed at a 52-week high on October 15, 2026. Traditional logic suggests investors should avoid the shares right now. A better approach examines the historical outcomes for investors who purchased the stock at previous highs. Does the rule hold for Thermo Fisher?
Why Thermo Fisher Stock Is At A High
Shares of Thermo Fisher rose 30.7% over the past year, before dividends. During a similar period, the company’s net income grew 5.8% over the twelve months to June 2026. Profit expanded, yet it trailed the pace of the stock.
Most of the gain came from investors paying more for each dollar of that profit. The price-to-earnings multiple expanded from 29.7 a year ago to 36.7 now. The underlying business is also selling more. Management noted on the July 2026 call that customer activity kept strengthening across its end markets. They added that its bioproduction business led growth in Life Sciences Solutions.
What Happened After Thermo Fisher Stock’s Earlier Highs?
Thermo Fisher reached nine earlier 52-week highs between October 2016 and October 2025. Evaluating performance a year later shows that the stock traded higher after seven of those nine peaks.
| 52-week high | Stock a year later | S&P 500, same year | Lowest point in that year |
|---|---|---|---|
| Mar 2017 | +28.4% | +11.8% | -4.8% |
| Aug 2017 | +30.7% | +18.0% | -0.503% |
| Jul 2018 | +25.3% | +6.3% | -9.1% |
| Feb 2019 | +33.6% | +21.4% | -1.0% |
| Nov 2019 | +56.8% | +16.2% | -16.8% |
| May 2020 | +34.5% | +38.1% | -3.7% |
| Jul 2021 | +6.6% | -10.1% | -5.9% |
| Mar 2024 | -10.9% | +10.0% | -15.3% |
| Sep 2024 | -23.2% | +19.8% | -37.5% |
A 52-week high is a close above every close of the 252 trading sessions before it, counted no more than once every 126 trading sessions. A year later is the close 252 trading sessions after the high. Changes are measured from the close on the day of the high; 0.0% in the last column means the stock did not close below it. Split-adjusted closing prices, dividends excluded.
The middle result delivered a gain of 28.4% a year later. Purchasing shares at the top did not prove to be a mistake for most investors who bought at a high.
Is A High A Worse Time To Buy?
Investors purchasing Thermo Fisher stock on any trading day over the same years typically saw the shares 18.9% higher a year later. That return sits 9.5 percentage points below the middle result following a peak. History shows a 52-week high has been a better time to buy this stock than an ordinary day.
What Should A Buyer At A High Expect?
Only two of the highs left buyers lower, both occurring in 2024. The September 2024 peak produced the worse outcome, leaving an investor 23.2% lower a year later. That decline provides ample reason to respect the old rule. Yet those two events stand as the only highs since 2016 that ended a year down.
Buyers who ultimately came out ahead generally faced a dip first. The typical low in the following year sat 5.9% below the purchase price across all nine earlier highs. Following the September 2024 high, the stock fell as far as 37.5% below the peak. Anyone purchasing shares at a high should prepare for a deeper dip than the typical one.
Does This Mean You Should Act On TMO?
Our purpose is to inform you with unique data so you make the right investment decisions. That said, betting on a single stock is always risky, no matter which direction you choose.
There is a smarter approach. Since its inception, the Trefis High Quality (HQ) Portfolio has returned 105%, beating the benchmark that combines the three major indices – the S&P 500, S&P Mid-cap, and Russell 2000. And it did so without taking the concentrated risk that comes with do-it-yourself stock picking. If that is how you want to invest, the HQ Portfolio is the place to start.