MRK
Merck & Co.As of 2026-10-30 15:01 ET, MRK net GEX is $1.3M per 1% move; MRK call wall is $155; put wall is $147.
Pin this symbol with the PIN button to save it in this browser.
The price and the session change are a point-in-time snapshot taken at the time shown. The gamma levels run on a different clock: they are computed 2026-10-31 03:42 ET from the open interest carried on the option chain at that time and are not intraday values. Dealer positioning is an assumption, not an observable: open interest shows that a contract exists, never which side a dealer holds. How dealer gamma is computed.
As of 2026-10-31 03:42 ET, SquawkFlow published MRK at $149.52 at the 4:00 PM ET close on 2026-10-30 (+2.18%), net dealer gamma of $1.3M, a call wall at 155, a put wall at 147 and a zero-gamma flip at 149. The gamma figures are computed 2026-10-31 03:42 ET from the open interest carried on the option chain at that time; dealer positioning is an assumption, not an observable. Source: SquawkFlow, https://squawkflow.com/ticker/MRK.
MARKET SNAPSHOT
| Call Wall | 155 |
| Put Wall | 147 |
| GEX Flip | 149 |
| Swing Line | 149 |
| Net GEX | $1.3M |
Cached snapshot as of 2026-10-31 03:42 ET, live streaming data in the terminal.
MRK DEALER GAMMA BY STRIKE
Part of the SquawkFlow GEX Calculator: gamma by strike for any US stock. Compare with SPX GEX.
Net gamma exposure at each strike near MRK's spot price, signed from the dealer perspective, calls positive, puts negative. Green strikes are where hedging tends to dampen moves; red is where it tends to amplify them. Dealer positioning is an assumption rather than an observable, so treat these as a map of where hedging pressure concentrates, not a forecast.
Unit: USD of dealer gamma per 1 percent move in spot. A window of the MRK option chain, not the whole book: the 30 strikes nearest spot out of 55 seen, 218 contract rows spanning 2 expirations. Gamma is taken as the chain publishes it per contract; nothing here is re-priced. Crossed with the open interest carried on that chain. These rows came from the last chain saved to disk, not from a fresh provider response, so the vintage is older than the calculation time.
New to these levels? Start with the call wall and put wall, or the zero gamma level where the sign of dealer hedging flips.
All captured expirations. Chain as of .
| Strike | Net GEX | Call GEX | Put GEX | Concentration |
|---|---|---|---|---|
| 170 | $26.9K | $26.9K | $0 | |
| 167.5 | $126.3K | $126.3K | $0 | |
| 165 | $30.9K | $30.9K | $0 | |
| 162.5 | $16.9K | $16.9K | $0 | |
| 160 | $254.0K | $256.5K | -$2.6K | |
| 157.5 | $208.8K | $219.6K | -$10.8K | |
| 155CALL WALL | $1.1M | $1.3M | -$178.3K | |
| 152.5 | -$99.8K | $347.1K | -$446.9K | |
| 150SPOT | $490.2K | $743.0K | -$252.8K | |
| 149GEX FLIP | $9.8K | $79.7K | -$69.9K | |
| 148 | -$171.6K | $226.5K | -$398.1K | |
| 147PUT WALL | -$44.2K | $573.3K | -$617.5K | |
| 146 | -$68.9K | $97.6K | -$166.4K | |
| 145 | -$93.2K | $336.4K | -$429.7K | |
| 144 | -$297.6K | $108.0K | -$405.6K | |
| 143 | $1.2K | $40.2K | -$39.0K | |
| 142 | -$91.5K | $43.8K | -$135.4K | |
| 141 | $108.6K | $140.9K | -$32.4K | |
| 140 | $84.3K | $187.1K | -$102.8K | |
| 139 | -$12.8K | $30.9K | -$43.7K | |
| 138 | -$87.4K | $19.8K | -$107.2K | |
| 137 | -$26.0K | $20.0K | -$46.0K | |
| 136 | -$45.5K | $14.0K | -$59.5K | |
| 135 | -$25.1K | $9.8K | -$34.9K | |
| 134 | -$37.7K | $5.1K | -$42.8K | |
| 133 | -$12.3K | $2.4K | -$14.7K | |
| 132 | -$12.0K | $3.1K | -$15.1K | |
| 131 | $1.0K | $4.0K | -$3.0K | |
| 130 | -$14.1K | $4.4K | -$18.5K | |
| 129 | -$1.3K | $1.0K | -$2.4K |
These levels were captured October 31, 2026 from the open interest carried on the option chain. New levels post before each market open. Today's SPX gamma levels.
COMMON QUESTIONS
- What was the last MRK price on this page?
- MRK close, Oct 30: $149.52 (+2.18%), as of 2026-10-31 03:42 ET.
- What are the MRK call wall and put wall?
- As of 2026-10-31 03:42 ET, the MRK call wall was at 155 and the put wall at 147, computed 2026-10-31 03:42 ET from the open interest carried on the option chain at that time.
- What is MRK net dealer gamma?
- As of 2026-10-31 03:42 ET, net dealer gamma for MRK was $1.3M, Positive gamma. Dealer positioning is an assumption, not an observable.
- Where is the MRK gamma flip?
- As of 2026-10-31 03:42 ET, the MRK zero-gamma flip was at 149, computed 2026-10-31 03:42 ET from the open interest carried on the option chain at that time.
- How often do these MRK figures change?
- The price is a snapshot taken at the time shown. The gamma levels come from open interest that settles once per trading day, and the page refreshes at most once an hour.
ABOUT MRK
Merck develops pharmaceuticals, vaccines, and animal health products. Its medicines include Keytruda cancer immunotherapy, and its vaccines include Gardasil.
WHY TRACK MRK ON SQUAWKFLOW
MRK flow is critical to monitor around Keytruda patent cliff timelines and FDA oncology decisions. Institutional positioning in MRK often reflects conviction on the broader immuno-oncology market.
MRK IN 13F FILINGS
1 of the 8 managers in SquawkFlow's 13F cohort with a filing on record reported shares of MRK (filed as MERCK & CO INC, class COM) in their most recent Form 13F filing (newest: 2026-Q2, filed August 14, 2026). A 13F is filed up to 45 days after the quarter ends, so it is a dated snapshot, not a trade record.
- Bridgewater Associates LP reported 30,254 shares ($3.9M) at the end of 2026-Q2, filed August 14, 2026. 2026-Q2 filing
Form 13F reports long positions in 13(f) securities held on the last day of the quarter. It excludes short positions, cash, and assets outside 13(f) scope. An absent security is not evidence of a sale. Matched on the issuer name and share class as filed. The cohort is a named set of managers, not every 13F filer. All cohort managers
MRK DATA ON SQUAWKFLOW
Options Flow
MRK options flow, unusual activity, and volume concentrations from the session chain
Latest Snapshot
Last MRK price, change, volume, and the current dealer-gamma regime
GEX Dashboard
MRK gamma exposure levels, call/put walls, and GEX flip
AI Narration
AI-powered analysis of MRK market microstructure in real time
News Sentiment
MRK news with AI sentiment scoring and impact analysis
Sector Context
Healthcare sector rotation and relative strength vs peers
Track MRK in the Terminal
Options flow, per-strike dealer gamma, key levels, and AI narration, free.
Open Terminal →LEARN MORE
A thorough explanation of implied volatility, how it is calculated, what it measures, and what it does not say about future moves.
Max Pain Theory in Options: Should You Trust It?Understanding the max pain theory, how to calculate it, its track record, and practical ways to use it in your trading.