Both in Pharmaceuticals

Merck & Co. vs Pfizer

Over the past year MRK returned +81.3% and PFE returned +23.8%; their daily moves had a correlation of 0.46.

MRK +81.3% PFE +23.8%Growth of $1, one year, split-adjusted
MetricMRKPFE
Price$149.52$30.52
Market cap$368.89B$173.95B
Today+2.18%+1.90%
1 month+4.0%+8.5%
6 months+33.3%+15.9%
Year to date+42.0%+22.6%
1 year+72.7%+25.6%
Revenue growth (YoY)+5.1%+2.6%
Gross margin73.5%72.8%
Net margin−8.0%−1.6%
P/E (TTM)116.3×40.2×
Price / sales5.5×2.7×
Net cash-$46.77B-$51.49B
Dividend yield2.27%5.64%
Volatility (60d)36.0%19.8%
Short % of float1.1%2.4%
Next earnings—Nov 3, 2026

Shading marks the stronger figure where one clearly exists (lower is better for valuation and volatility).