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iShares MSCI USA Size Factor SIZE 177.9 1.54 0.87%

SIZE Gamma Exposure (GEX)

SIZE (iShares MSCI USA Size Factor): See how call and put gamma exposure is distributed across option strikes. Free delayed preview.

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ATM IV
0.142
Put Call Ratio (OI)
Put Call Ratio (Vol)
IV Rank
26.5
IV Percentile
35.4
Max Pain
179

Gamma exposure (2026-09-21)

GEX estimates dealer hedging flow at each strike.

Positive GEX = dealers are long gamma; they buy the dip and sell the rip, dampening volatility. Negative GEX = dealers are short gamma; they sell the dip and buy the rip, amplifying volatility.

DTE \text{DTE}
25.0
179.0
| Δ | |\Delta|
0.00
1.00
Moneyness Moneyness
-57.8
57.8
View values by strike
SIZE · Gamma exposure · 2026-09-21. USD of exposure per 1% underlying move.
StrikeCallsPuts
165.00 0 -443
179.00 0 -77.8 K