Data through close

CTAS max pain, gamma exposure (GEX) & options open interest

As of close · rank #1295 by open interest · snapshot page

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CTAS's nearest-expiration max pain is 197.50 for 2026-10-09, its GEX flip is 188.82, net GEX is 505,181, its put/call open-interest ratio is 0.87. These are whole-chain derived aggregates as of Oct 2, 2026 close.

Close
193.02
prev 195.60
Gamma max
211.61
+9.6% from close
Delta neutral
187.88
-2.7% from close
Gamma neutral
188.82
-2.2% from close
Open interest
29,634
-2.5% vs prev
Contracts listed
393
234 calls · 194 puts

Whole-chain analytics

Derived after the close from the same dated options chain. Signed gamma exposure uses calls positive and puts negative; it is a model convention, not observed dealer inventory.

Nearest max pain
197.50
+2.3% from close
2026-10-09
GEX flip
188.82
-2.2% from close
Net GEX
505,181
1,704,734 per 100k OI
Call wall
200.00
+3.6% from close
Put wall
180.00
-6.7% from close
Put/call OI
0.87
13,748 puts / 15,886 calls

Advanced options analysis

Complete derived analysis from the dated chain, normalized where possible for comparison across tickers. Catalyst intensity measures unusual pricing and activity; it does not identify an event, predict direction, or establish that an investment is attractive.

Catalyst intensity
–
cross-sectional score / 100
Directional score
–
IV rank
85.6
within trailing 52-week range
Front / back ATM IV
+25.9% / +24.4%
1.5 pp front premium
Expected move
+3.6%
7 DTE · one standard deviation
ATM straddle / spot
+3.2%
front-window midpoint premium
25Δ risk reversal
1.4 pp
put IV minus call IV
IV butterfly
-1.6 pp
front-window smile convexity
Volume / open interest
0.02
648 contracts traded
Normalized net delta
0.065
option-holder convention
Modeled dealer delta
-0.065
opposite-side scenario
Vanna / 100k OI
3,834
volatility-sensitive delta
Charm / 100k OI
19,832
time-decay-sensitive delta
IV surface range
131.0 pp
published contour maximum minus minimum

Download the complete dated analysis JSON .

CTAS closed 9.6% below its gamma max of 211.61. It is 2.7% above the delta neutral price of 187.88. Total open interest is 29,634, -2.5% versus the previous session. What gamma max means · What delta neutral means

History

Full history since 2020: drag to pan, scroll to zoom, hover for values. Open full-screen chart

Analysis visualizations

Derived from the 2026-10-02 options chain. Select an analysis to explore its chart.

Gamma walls

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In today's screens

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Neighbours by open interest

← VNQ (#1294) GPK (#1296) →

Questions people ask about CTAS

Where is CTAS's gamma max today?

As of Oct 2, 2026, the gamma max for CTAS is 211.61, +9.6% from the 193.02 close. Gamma max is the underlying price at which the summed gamma of every open contract is largest; how it is computed and why it matters.

Is CTAS above or below its delta neutral price?

CTAS closed above delta neutral: 193.02 against a delta neutral price of 187.88. The delta neutral price is where the summed delta of the whole chain is zero; the definition.

How much open interest does CTAS have?

29,634 contracts of open interest across 393 listed contracts on Oct 2, 2026, -2.5% versus the previous session. What open interest measures.

Levels are recomputed after every trading day from licensed end-of-day options data; only derived aggregates are published. Methodology · Data and licence · Not investment advice.