What is the current XEO expected move?

As of Jul 15, 2026, S&P 100 Index (European-style options) (XEO) has an expected move of 3.87% over the next 30 days, implying a one-standard-deviation price range of $3589.00 to $3878.00 from the current $3733.50. The expected move is derived from at-the-money straddle pricing and represents the market consensus for a ±1σ price move.

What does the XEO 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 XEO 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 100 Index (European-style options) (XEO) 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.

Snapshot as of Jul 15, 2026.

Spot Price: $3733.50
Expected Move: 3.9%
Implied High: $3878.00
Implied Low: $3589.00
Front DTE: 30 days

As of Jul 15, 2026, S&P 100 Index (European-style options) (XEO) has an expected move of 3.87%, a one-standard-deviation implied price range of roughly $3589.00 to $3878.00 from the current $3733.50. 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.

XEO Strategy Sizing to the Expected Move

With S&P 100 Index (European-style options) pricing an expected move of 3.87% from $3733.50, 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 XEO 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 3.87%, anchoring an implied range of approximately $3589.00 to $3878.00. 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.

XEO 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. XEO term-structure is in backwardation (slope 0.000), so near-dated tenors price in disproportionate vol - usually because of a known event in the front-month window. With IV rank at 15.5%, the implied move is at the low end of the typical XEO range - cheap optionality for buyers, thin premium for sellers.

Sizing XEO 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. XEO put/call volume ratio currently at 0.00 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 XEO derived from ATM implied volatility at each listed expiration. Implied high/low bounds are computed as $3733.50 × (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 17, 2026	2	21.7%	1.6%	$3793.47	$3673.53
Jul 24, 2026	9	13.1%	2.1%	$3810.30	$3656.70
Jul 31, 2026	16	13.3%	2.8%	$3837.46	$3629.54
Aug 7, 2026	23	13.4%	3.4%	$3859.09	$3607.91
Aug 14, 2026	30	13.5%	3.9%	$3878.00	$3589.00
Aug 21, 2026	37	13.5%	4.3%	$3893.97	$3573.03
Aug 28, 2026	44	14.1%	4.9%	$3916.27	$3550.73
Sep 18, 2026	65	14.6%	6.2%	$3963.53	$3503.47
Sep 30, 2026	77	15.0%	6.9%	$3990.72	$3476.28
Dec 18, 2026	156	16.5%	10.8%	$4136.23	$3330.77
Dec 31, 2026	169	16.7%	11.4%	$4157.76	$3309.24
Mar 19, 2027	247	17.8%	14.6%	$4280.19	$3186.81
Mar 31, 2027	259	17.7%	14.9%	$4290.16	$3176.84
Jun 17, 2027	337	18.7%	18.0%	$4404.35	$3062.65
Jun 30, 2027	350	18.8%	18.4%	$4420.82	$3046.18
Dec 17, 2027	520	19.4%	23.2%	$4598.01	$2868.99
Jun 16, 2028	702	19.3%	26.8%	$4732.80	$2734.20

Frequently asked XEO expected move questions

What is the current XEO expected move?: As of Jul 15, 2026, S&P 100 Index (European-style options) (XEO) has an expected move of 3.87% over the next 30 days, implying a one-standard-deviation price range of $3589.00 to $3878.00 from the current $3733.50. The expected move is derived from at-the-money straddle pricing and represents the market consensus for a ±1σ price move.
What does the XEO 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 XEO 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.