Net Harvest Score
Canonical definition, formula, interpretation, and API reference.
Definition
0-100 composite: is this a good time to sell premium? Combines VRP, gamma regime, dealer flow risk, term structure.
Formula
Composite of VRP percentile, gamma regime, dealer flow risk, term structure
Proprietary weighting. Higher = better for selling.
Inputs
VRP z-scoregamma regimedealer flow riskterm structure
Output
net_harvest_score (0-100)
Interpretation
- >70: strong harvest conditions
- 40-70: moderate
- <40: poor — avoid selling premium
API Reference
Endpoint
GET /v1/vrp/{symbol}
Tier
Alpha+
Response field
net_harvest_score
Why Harvest Score Matters for Trading
TL;DR
Harvest score is a 0–100 composite asking 'is premium harvestable now?'. Above 60 = go. Below 30 = don't. Captures VRP + regime + flow risk.
- What it measures
- A composite score (0–100) blending VRP level, vol term structure, dealer regime, and dealer flow risk.
- What it signals
- Whether short-premium trades have the structural tailwind right now.
- Why we measure it
- The individual inputs (VRP, regime, flow risk) tell separate stories. Harvest combines them into a single go/no-go threshold.
- Who uses it
- Systematic vol sellers, short-premium desks, iron-condor strategies. ALPHA TIER.
How to read Harvest Score
High (≥ 60)
- All sub-signals aligned for sellers
- Full-size short premium
- Iron condors, strangles, covered calls
- Best condition for harvesting
Good for: full-size short premium
Low (< 30)
- Sub-signals hostile to sellers
- Do not sell premium
- Consider long vol / hedges
- Toxic short-vol regime
Bad for: short premium
Mid (30–60)
- Mixed signals
- Reduced size
- Only highest-conviction names
- Wait for confirmation
Reduce
Rules of thumb
- Use as primary gate. Threshold first; individual inputs second.
- Pair with dealer flow risk. Harvest + low flow risk = best setup. Harvest + high flow risk = size down.
- Updates intraday. Score shifts as VRP and regime shift — re-check before entering.
- Name-specific. Harvest scores differ across tickers. Don't apply SPX score to single stocks.
- Alpha tier only. Composite score requires the full input set — Alpha-gated.
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