What is the current SPGI expected move?

As of Aug 14, 2026, S&P Global Inc. (SPGI) has an expected move of 7.49% over the next 28 days, implying a one-standard-deviation price range of $387.66 to $450.46 from the current $419.06. The expected move is derived from at-the-money straddle pricing and represents the market consensus for a ±1σ price move.

What does the SPGI 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 SPGI 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.

S&P Global Inc. (SPGI) 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.

S&P Global Inc. (SPGI) operates in the Financial Services sector, specifically the Financial - Data & Stock Exchanges industry, with a market capitalization near $120.90B, listed on NYSE, employing roughly 44,500 people, carrying a beta of 1.07 to the broader market. S&P Global Inc. Led by Martina L. Cheung, public since 1973-02-21.

Snapshot as of Aug 14, 2026.

Spot Price: $419.06
Expected Move: 7.5%
Implied High: $450.46
Implied Low: $387.66
Front DTE: 28 days

As of Aug 14, 2026, S&P Global Inc. (SPGI) has an expected move of 7.49%, a one-standard-deviation implied price range of roughly $387.66 to $450.46 from the current $419.06. 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.

SPGI Strategy Sizing to the Expected Move

With S&P Global Inc. pricing an expected move of 7.49% from $419.06, 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 SPGI 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 7.49%, anchoring an implied range of approximately $387.66 to $450.46. 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.

SPGI 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. SPGI term-structure is in backwardation (slope -0.011), so near-dated tenors price in disproportionate vol - usually because of a known event in the front-month window.

Sizing SPGI 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. SPGI put/call volume ratio currently at 1.48 indicates protective put flow dominates - look for hedged-money positioning into the move. 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 SPGI derived from ATM implied volatility at each listed expiration. Implied high/low bounds are computed as $419.06 × (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
Aug 21, 2026	7	23.7%	3.3%	$432.81	$405.31
Aug 28, 2026	14	26.4%	5.2%	$440.73	$397.39
Sep 4, 2026	21	26.1%	6.3%	$445.29	$392.83
Sep 11, 2026	28	26.5%	7.3%	$449.82	$388.30
Sep 18, 2026	35	25.4%	7.9%	$452.02	$386.10
Sep 25, 2026	42	27.4%	9.3%	$458.01	$380.11
Oct 2, 2026	49	27.6%	10.1%	$461.44	$376.68
Oct 16, 2026	63	26.8%	11.1%	$465.72	$372.40
Nov 20, 2026	98	28.7%	14.9%	$481.38	$356.74
Dec 18, 2026	126	28.9%	17.0%	$490.22	$347.90
Jan 15, 2027	154	29.6%	19.2%	$499.63	$338.49
Feb 19, 2027	189	30.8%	22.2%	$511.94	$326.18
Mar 19, 2027	217	30.8%	23.7%	$518.58	$319.54
Jun 17, 2027	307	31.1%	28.5%	$538.59	$299.53
Dec 17, 2027	490	32.0%	37.1%	$574.43	$263.69
Jan 21, 2028	525	32.3%	38.7%	$581.40	$256.72

Frequently asked SPGI expected move questions

What is the current SPGI expected move?: As of Aug 14, 2026, S&P Global Inc. (SPGI) has an expected move of 7.49% over the next 28 days, implying a one-standard-deviation price range of $387.66 to $450.46 from the current $419.06. The expected move is derived from at-the-money straddle pricing and represents the market consensus for a ±1σ price move.
What does the SPGI 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 SPGI 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.