Reading the market regime before prices move

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GAMMA EXPOSURE · Dealer positioning

MRK Gamma Exposure Today: Positioning Walls and the Flip

Every number here is computed from the traded MRK options chain. The call wall is where dealer hedging accumulates above spot and caps upside, the put wall is its mirror below, and the gamma flip is the level where hedging stops damping moves and starts amplifying them.

Members only Last update:

The short answer

Where is the MRK gamma flip today?
The MRK gamma flip is computed and refreshed through the session; where price sits against it is for members.
Where are the MRK call wall and put wall?
Both walls are computed from the options chain and refresh during the session. Their levels are for members.
What does MRK gamma positioning mean for the session?
In positive gamma, dealer hedging tends to dampen moves; in negative gamma it tends to follow them, so swings widen. This symbol's current regime is for members. A positioning read, not advice. Exact levels and minute-by-minute tracking are for members. Unlock every symbol: 5 free trading sessions →

Computed

MRK levels at the Oct 21, 2026 close

Closing price $149.59
Call wall $150.00
Put wall $135.00
Gamma flip $141.50

Last completed session, from the Finviro engine close archive · today's session levels refresh every five minutes inside the platform.

MRK gamma levels are for members

Price moves between these levels whether you see them or not. The difference is knowing them before your decision, not after.

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Merck & Co., Inc. in numbers: what it does and how it makes money

Merck & Co., Inc. is a company in the Healthcare sector (Drug Manufacturers - General), listed on the New York Stock Exchange since 1978, with a market value of about $350.67B. It is led by Robert Davis and has about 74,000 employees.

Merck & Co., Inc. is a global healthcare leader with operations spanning two core divisions: Pharmaceuticals and Animal Health. The Pharmaceutical segment is dedicated to human health, offering a broad spectrum of medicinal products. These cover crucial therapeutic areas such as oncology, acute hospital care, immunology, neuroscience, virology, cardiovascular conditions, and diabetes. This division also develops…

Its beta is 0.22: the stock is usually calmer than the broad market, so its moves are narrower than the index.

On the price was $149.59, above its 50-day simple average (DMA-50 at $145.77) by 2.6%, and above its 200-day average (DMA-200 at $125.27) by 19%. Price is above both averages: the medium- and long-term trend is up.

Revenue was $65.01B in fiscal year 2025, against $48.7B in 2021, a change of +33% over 4 years.

Out of every $100 of revenue, about $28 is left as net income after all costs and taxes, so the net margin is 28%.

Earnings per share were $7.30 in 2025, against $5.16 in 2021.

Free cash flow was $12.36B: the cash left after spending on operations and investment, which funds dividends and buybacks.

These numbers describe the company's size and profitability and change slowly, while gamma levels describe how the stock moves within the session.

Source: exchange listing data · averages from daily closing prices · company filings with the US Securities and Exchange Commission (SEC) · fiscal year 2025

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