No. 61 · Wednesday 20 May 2026 · NSE, data through close
Redesign v5 · One-thesis + Market Health · Real data
Dealers Flip Short Gamma — Moves Can Overshoot
Nifty rose 0.17% but the shift from +69,768 to -890 net gamma alters the risk profile.
What happenedThe index climbed 0.17% as dealer positioning flipped from long to short gamma.
The tensionThe small gain belies a structural shift: short gamma amplifies moves, challenging the Recovering trend in a Bear Market.
Net readThe session transitioned the market's gamma regime from Stabilizing to Low Gamma, elevating volatility risk.
Nifty Close
23,659.00
+0.17%
Market Phase
🔴 Bear Market
session 7 · ↑ recovering
MHI
37.37
14th %ile
Risk
Very High
confidence 45
FII Idx Fut
−222.5K
9.3th %ile
Walls
23.5–23.7K
PE base · CE wall
01 The crowd
01 The Crowd
Positioning over the last 20 sessions
FII net index futures · 20 sessions · '000 contracts · endpoint = 20 May · source: StratLab participant OI
What this means: Nifty edged up 0.17% as dealer gamma flipped from +69,768 to -890, signaling a shift from dampener to accelerator.
02 The turn
02 The Turn
What this means: Net gamma stands at -890 after +69,768 prior; near-money IV hovers at 16%. The regime flipped from Stabilizing to Low Gamma, resetting intraday dynamics.
03 The catch
03 The Catch
Market health over the last 20 sessions
Market Health Index · 20 sessions · 0–100 · endpoint = 20 May · percentiles vs 1,202 sessions
What this means: StratLab Breadth Index at 37.37 (13.9th percentile) with 45.0% confidence confirms a Bear Market, now in its 7th day. Risk is Very High despite a Recovering trend.
Phase
🔴 Bear Market
risk Very High
Participation
47.0942
delivery breadth
StratLab Breadth Index
35.7
31th %ile, trailing year
04 Days like today
04 Days Like Today
In 62 similar conditions, the average 5-day forward return was -0.05%, with a worst drawdown of -4.77%.
Conditions analog · Phase + Trend + Risk match
n = 62 · tier: exact
Horizon
Avg
Median
Win rate
Worst
Next session
−0.20%
−0.16%
36%
−4.78%
Next 5 sessions
−0.05%
+0.00%
50%
−4.77%
Next 10 sessions
+0.25%
+0.48%
54%
−7.12%
Next 20 sessions
+1.34%
+0.82%
63%
−6.63%
Conditions like today historically favored a negative 5-day bias, with the worst case a 4.77% drop.
Defensive
05 Tomorrow's tripwires
Three checks that settle the argument
Wire Confirm
A close above 23659 alongside a 5-day return exceeding -0.05% would signal resilience.
Wire Watch
A 5-day decline between -0.05% and -4.77% warrants caution amid negative gamma.
Wire Break
A 5-day loss greater than 4.77% points to breakdown potential.
The ledger
Where that leaves us
Lines up bullish
Nifty held a 0.17% gain during the gamma regime switch.
Recovering trend within Bear Market suggests downside may be limited.
62 analog days show a mild average decline of just -0.05%.
Lines up bearish
Dealers short -890 gamma exposes the index to outsized swings.
StratLab Breadth Index in the 13.9th percentile underscores deep bear conditions.
Forward 5-day worst case of -4.77% in similar past set-ups.
Net read: Bearish with elevated volatility risk. The gamma flip and depressed breadth argue for a cautious posture despite the recovering trend.
The 0.17% uptick obscures a critical change: dealers flipped to short gamma, turning the market from stabilized to amplification-prone in a Bear Market. Historical analogs show a negative bias, keeping risk firmly elevated.