MRK vs PFE

A side-by-side look at MRK and PFE, updated throughout the trading session.

MRKMRK Open MRK on Vela

PFEPFE Open PFE on Vela

Performance, normalized

Z-scored closes: both paths on one scale, price levels aside.

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MRK vs PFE: how they differ

Merck & Co., Inc. (MRK) and Pfizer Inc. (PFE) are both in the Healthcare sector, in the same Drug Manufacturers - General industry. Both trade on NYSE.

MRK trades about 10.3 million shares a day on average, against 38.6 million for PFE. PFE has the higher beta (0.28 against 0.22 for MRK), meaning it has historically moved more with the broad market. Over the trailing twelve months, MRK paid $3.40 per share in dividends and PFE paid $1.72 per share.

Figures as of October 25, 2026.

The chart Z-score-normalizes each closing series, computing (close − mean) ÷ standard deviation over the window, so both paths share one scale regardless of price level, and correlation is computed on daily returns. Figures update throughout the trading session. Nothing on this page is financial advice.