Gamma exposure / BAC
BAC gamma exposure
Dealer hedging is positioned to add to moves.
BAC is at 55.03, 1.84% below its gamma flip at 56.04. In negative gamma, dealer hedging tends to push with moves instead of against them, so moves can run further.
The call wall is 57 and the put wall is 55. The king node, the strike where dealer hedging is most concentrated, is 55.
As of 4:14 PM ET, Tue Sep 29. The live map refreshes through the trading day.
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The numbers
| Price | 55.03 |
|---|---|
| Gamma regime | Negative gamma |
| Gamma flip | 56.04+1.84% |
| Call wall | 57+3.58% |
| Put wall | 55-0.05% |
| King node | 55-0.05% |
| Total dealer gamma | -$0.02bn per 1% move |
Common questions
- Is BAC in positive or negative gamma right now?
- Negative gamma. As of 4:14 PM ET, Tue Sep 29, BAC is at 55.03, 1.84% below its gamma flip at 56.04. In negative gamma, dealer hedging tends to push with moves instead of against them, so moves can run further.
- Where is BAC's gamma flip?
- At 56.04, +1.84% from the price of 55.03. The flip is the price where total dealer gamma crosses zero: positive gamma above it, negative below.
- What are BAC's call wall and put wall?
- The call wall is 57 and the put wall is 55. The call wall is the strike above the price with the largest positive dealer gamma; the put wall is the strike below it with the largest negative dealer gamma. They mark where hedging pressure tends to lean against price.
- What is BAC's king node?
- 55. It's the strike with the largest absolute dealer gamma, where hedging is most concentrated.
How it's calculated
Levels come from the BAC options chain (expiries out to 45 days, strikes within 18% of the price), modeled with the industry-standard convention that dealers are long calls and short puts. It's a model of positioning, not a measurement. Full formulas are on the methodology page.