What is the current MRK expected move?

As of Jun 30, 2026, Merck & Co., Inc. (MRK) has an expected move of 7.52% over the next 31 days, implying a one-standard-deviation price range of $118.77 to $138.09 from the current $128.43. The expected move is derived from at-the-money straddle pricing and represents the market consensus for a ±1σ price move.

What does the MRK expected move mean for traders?

Roughly 68% of outcomes should fall within ±1 expected move and 95% within ±2 under lognormal assumptions, though equity returns have empirically fatter tails than log-normal predicts. Strategies sized to the expected move (iron condors at ±1σ, strangles at ±1.5σ) target the typical outcome distribution; strategies that profit from tail moves (long-vol structures, ratio backspreads) target the tails the lognormal model under-prices.

How is MRK expected move calculated?

The expected move displayed here is derived from at-the-money implied volatility scaled to the chosen tenor: expected move % is approximately ATM IV times sqrt(T / 365), where T is days to expiration. An equivalent straddle-based form: the ATM straddle (call + put at the same strike) is roughly sqrt(2/pi) times spot times IV times sqrt(T/365), so the implied one-standard-deviation move is approximately 1.25 times ATM straddle divided by spot. The two formulations agree once the sqrt(2/pi) constant is reconciled.

Merck & Co., Inc. (MRK) Expected Move

Expected move estimates the probable price range for a given period based on at-the-money options pricing. It reflects the market consensus for volatility over the selected timeframe.

Merck & Co., Inc. (MRK) operates in the Healthcare sector, specifically the Drug Manufacturers - General industry, with a market capitalization near $317.08B, listed on NYSE, employing roughly 73,000 people, carrying a beta of 0.22 to the broader market. Merck & Co. Led by Robert Davis, public since 1978-01-13.

Snapshot as of Jun 30, 2026.

Spot Price: $128.43
Expected Move: 7.5%
Implied High: $138.09
Implied Low: $118.77
Front DTE: 31 days

As of Jun 30, 2026, Merck & Co., Inc. (MRK) has an expected move of 7.52%, a one-standard-deviation implied price range of roughly $118.77 to $138.09 from the current $128.43. Expected move is derived from at-the-money straddle pricing and represents the market's pricing of a ±1σ move. Roughly 68% of outcomes should fall within this range under lognormal assumptions, though empirical markets have fatter tails.

MRK Strategy Sizing to the Expected Move

With Merck & Co., Inc. pricing an expected move of 7.52% from $128.43, risk-defined strategies sized to the implied range structurally target the modal outcome distribution. Iron condors with wings at the ±1σ expected move boundaries collect premium against the ~68% probability that spot stays inside the range under lognormal assumptions; strangles set wider at ±1.5σ or ±2σ target the tails but pay smaller per-trade premium. Long-vol structures (long straddles, ratio backspreads) profit when realized move exceeds the implied move, the inverse trade: they bet against the lognormal assumption itself, capitalizing on the empirically fatter equity-return tails.

How to read the MRK implied-range chart

The shaded range above shows the one-standard-deviation implied price band at each listed expiration, derived from ATM implied volatility scaled to days-to-expiration. The front-tenor expected move is 7.52%, anchoring an implied range of approximately $118.77 to $138.09. Under lognormal assumptions, roughly 68% of outcomes fall inside that band; 95% fall inside ±2σ; 99.7% inside ±3σ. The empirical equity-return distribution has fatter tails than lognormal, so true tail-outcome frequency is moderately higher than these closed-form numbers suggest.

MRK expected move and event pricing

Expected move widens with √time: a 5% 30-day move corresponds to roughly a 2.5% 7.5-day move and a 10% 120-day move. MRK term-structure is in contango (slope 0.046), so longer-dated tenors price in proportionally more vol than √time scaling alone would suggest - typically because long-dated cycles include uncertain macro states.

Sizing MRK structures to the expected move

Iron condors with wings at ±1σ collect the modal-outcome premium; ±1.5σ widens probability of inside-range to ~87% but cuts collected premium roughly in half. Strangles do the inverse trade - they pay against the same lognormal distribution, profiting when realized exceeds implied. Calendar spreads bet on the slope of the term structure rather than the level. MRK put/call volume ratio currently at 0.48 indicates speculative call flow dominates - look for upside-skewed sentiment. The expected move is the inputs the chain is pricing, not a forecast - realized moves above or below are normal under any distribution.

Learn how expected move is reported and how to read the data →

Shaded band shows the ±1σ implied price range (~68% probability under lognormal assumptions) at each expiration; the center line marks current spot. Bands widen with longer DTE since volatility scales with √time.

Per-expiration expected move for MRK derived from ATM implied volatility at each listed expiration. Implied high/low bounds are computed as $128.43 × (1 ± expected move %). One standard-deviation range under lognormal assumptions, roughly 68% of outcomes fall inside.

Expiration	DTE	ATM IV	Expected Move	Implied High	Implied Low
Jul 2, 2026	2	31.0%	2.3%	$131.38	$125.48
Jul 10, 2026	10	25.6%	4.2%	$133.87	$122.99
Jul 17, 2026	17	26.1%	5.6%	$135.66	$121.20
Jul 24, 2026	24	26.4%	6.8%	$137.12	$119.74
Jul 31, 2026	31	26.2%	7.6%	$138.24	$118.62
Aug 7, 2026	38	30.8%	9.9%	$141.19	$115.67
Aug 21, 2026	52	29.8%	11.2%	$142.88	$113.98
Sep 18, 2026	80	29.7%	13.9%	$146.29	$110.57
Oct 16, 2026	108	29.0%	15.8%	$148.69	$108.17
Dec 18, 2026	171	29.9%	20.5%	$154.71	$102.15
Jan 15, 2027	199	29.4%	21.7%	$156.31	$100.55
Mar 19, 2027	262	29.6%	25.1%	$160.64	$96.22
Jun 17, 2027	352	29.5%	29.0%	$165.64	$91.22
Dec 17, 2027	535	29.8%	36.1%	$174.77	$82.09
Jan 21, 2028	570	29.4%	36.7%	$175.62	$81.24

Frequently asked MRK expected move questions

What is the current MRK expected move?: As of Jun 30, 2026, Merck & Co., Inc. (MRK) has an expected move of 7.52% over the next 31 days, implying a one-standard-deviation price range of $118.77 to $138.09 from the current $128.43. The expected move is derived from at-the-money straddle pricing and represents the market consensus for a ±1σ price move.
What does the MRK expected move mean for traders?: Roughly 68% of outcomes should fall within ±1 expected move and 95% within ±2 under lognormal assumptions, though equity returns have empirically fatter tails than log-normal predicts. Strategies sized to the expected move (iron condors at ±1σ, strangles at ±1.5σ) target the typical outcome distribution; strategies that profit from tail moves (long-vol structures, ratio backspreads) target the tails the lognormal model under-prices.
How is MRK expected move calculated?: The expected move displayed here is derived from at-the-money implied volatility scaled to the chosen tenor: expected move % is approximately ATM IV times sqrt(T / 365), where T is days to expiration. An equivalent straddle-based form: the ATM straddle (call + put at the same strike) is roughly sqrt(2/pi) times spot times IV times sqrt(T/365), so the implied one-standard-deviation move is approximately 1.25 times ATM straddle divided by spot. The two formulations agree once the sqrt(2/pi) constant is reconciled.