Stock Comparison · Live Data
PFE vs MRK
Side-by-side comparison of Pfizer Inc. (PFE), Merck & Co., Inc. (MRK) — live price, market cap, day change, and sector classification.
PFE vs MRK — which stock is the better buy?
Merck & Co., Inc. (MRK) leads this comparison by market capitalization at $277.02B. MRK is today's top mover with a +1.14% move, while PFE sees the highest trading volume at 22.23M shares.
Whether PFE vs MRK is the better investment for your portfolio depends on your time horizon, risk tolerance, and existing exposure. ArbibX runs Claude AI across thousands of US stocks daily and surfaces the most actionable picks with confidence scores and target prices. For a personalized analysis on PFE vs MRK, use the in-app "Ask Claude" assistant — it sees the live prices from this page plus your portfolio context.
Per-stock breakdown
- PFE — Pfizer Inc. trades at $26.32, day change -0.02%, pharmaceutical preparations sector, market cap $149.77B.
- MRK — Merck & Co., Inc. trades at $113.44, day change +1.14%, pharmaceutical preparations sector, market cap $277.02B.
Frequently asked
Which is the better stock — PFE vs MRK?
It depends on your goals. Merck & Co., Inc. (MRK) has the larger market cap at $277.02B. Today MRK is the strongest performer (+1.14%). For a qualitative read on each name use the AI Top 15 tab on ArbibX.
What is the current price of PFE and MRK?
PFE is trading at $26.32 (-0.02% on the day). MRK is trading at $113.44 (+1.14% on the day). Live prices update every minute on the ArbibX terminal.
How does ArbibX compare stocks?
ArbibX pulls live snapshot data from Polygon.io and pairs it with Claude-powered AI analysis. Comparison pages show price, market cap, day change, sector, and key technicals side by side. The deeper analysis (target prices, signals, risk notes) lives on each ticker's dedicated page.
Not financial advice · For informational purposes only · Data via Polygon.io