The StratLab Daily
No. 56 · Wednesday 13 May 2026 · NSE, data through close
Redesign v5 · One-thesis + Market Health · Real data
Dealers flipped short gamma — moves can now overshoot.
NIFTY +0.14% to 23,413. Positive dealer gamma dampens intraday swings; negative gamma amplifies them. A sign change resets how the index trades.
What happenedNIFTY +0.14% to 23,413. Dealers flipped short gamma — moves can now overshoot.
The tensionMarket Health is Bear Market at Very High risk, 4th percentile.
Net readA tactical move inside a fragile backdrop.
Nifty Close
23,412.60
+0.14%
Market Phase
🔴 Bear Market
session 2 · ↑ recovering
Risk
Very High
confidence 45
FII Idx Fut
−237.9K
5.2th %ile
Walls
23.4–23.5K
PE base · CE wall
01 The crowd
Dealers flipped short gamma — moves can now overshoot.
Positioning over the last 20 sessions
FII net index futures · 20 sessions · '000 contracts · endpoint = 13 May · source: StratLab participant OI
What this means: Positive dealer gamma dampens intraday swings; negative gamma amplifies them. A sign change resets how the index trades.
02 The turn
What changed today
What this means: Net gamma -4,247 vs +53,791 prior · regime: Stabilizing → Low Gamma · near-money IV ≈18%
03 The catch
Market Health reads Bear Market
Market health over the last 20 sessions
Market Health Index · 20 sessions · 0–100 · endpoint = 13 May · percentiles vs 1,197 sessions
What this means: the index moved; Market Health's 4th-percentile read says the internals haven't confirmed it yet.
Phase
🔴 Bear Market
risk Very High
Participation
35.1406
delivery breadth
StratLab Breadth Index
38.3
31th %ile, trailing year
04 Days like today
59 sessions like this one.
Every session sharing today's Market Health signature — bear market, Very High risk — 59 of them on record.
Conditions analog · Phase + Trend + Risk match
n = 59 · tier: exact
| Horizon | Avg | Median | Win rate | Worst |
|---|
| Next session | −0.23% | −0.16% | 34% | −4.78% |
| Next 5 sessions | −0.07% | +0.00% | 49% | −4.77% |
| Next 10 sessions | +0.25% | +0.48% | 54% | −7.12% |
| Next 20 sessions | +1.34% | +0.82% | 63% | −6.63% |
This compares today against every session sharing the same Market Health signature, regardless of what triggered it.
Conditions like today historically favored caution, with exposure kept tight.
05 Tomorrow's tripwires
Three checks that settle the argument
Market Phase exits upward
Bear Market runs a median of 2 session(s) (max 16) — this is session 2. 17% of exits went up.
Market Health crosses the 50 midline
MHI at 22.2 — a close back above 50 would end the 4th-percentile read.
Phase slips to Bear Market
0.0% of Bear Market exits went straight to Bear — the conditions analog's worst 5-session outcome (−4.77%) lives on that path.
The ledger
Where that leaves us
Lines up bullish
- Dealers flipped short gamma — moves can now overshoot.
Lines up bearish
- Market Health 4th percentile · Very High risk
- Conditions analog: −0.07% avg next 5 · 49% win
Net read: A tactical move inside a fragile backdrop.
Dealers flipped short gamma — moves can now overshoot. A tactical move inside a fragile backdrop.
Regime
BEAR