Long guts
A bet on movement—or its absence—via straddles and strangles; theta and implied vol matter as much as direction.
Overview
Long guts sits in the Options chapter of the systematic catalog. On QUSXFI we treat it as a testable hypothesis: specify entries, exits, sizing, and costs—then ask whether edge survives out-of-sample scrutiny.
Discretionary traders often arrive at similar ideas intuitively; the quantitative version forces you to write the rule before you see the next bar. That discipline is what makes results reproducible—or exposes them as luck.
Based on the research catalog 151 Trading Strategies (Kakushadze & Serur, 2018), section 2.24. Educational summary—not a replication of the full formal definition.
Volatility Expression
Wing liquidity and gap opens determine whether Long guts breakevens in research survive contact with live bid/ask.
Before backtesting Long guts, write the economic hypothesis in one sentence a risk manager would accept or reject.
Implementation and Research Process
Build Long guts on a vol surface with consistent sticky-strike or sticky-delta assumptions—document which you chose and why.
Tag event weeks in Long guts performance—pre/post earnings vol crush is not the same as macro vol regimes.
Decompose Long guts into signal, portfolio construction, and execution modules—each must be path-independent given the same historical tape.
Risk: What Breaks This Strategy
Long guts is short gamma when you sell vol and long theta until it is not—gap opens destroy mean-reversion assumptions baked into straddle pricing.
Volatility mean-reverts, but not on your schedule; carrying a long vol book through a low-vol grind erodes capital before the spike arrives.
Bid-ask on wings and near-expiry options turns theoretical breakevens into practical losses, especially in single names.
Common Mistakes to Avoid
- Reporting Long guts backtests without fees, slippage, and realistic fill rules.
- Hedging Long guts inconsistently across sticky-strike and sticky-delta assumptions.
- Deploying Long guts live before paper trading through at least one adverse Options month.
- Using mid marks on Long guts OTM wings; live exits happen at bid.
How to Study This Strategy
- Compare Long guts to a naive straddle hold—did rules add value net of adjustments?
- Document Long guts left-tail days where the model said hold and the book said flatten.
- Paper-trade Long guts through one event week with bid/ask exits only.
- Define Long guts vol view (long/short, structure) and hedge bands in writing before opening Excel.
- Build Long guts on one underlying with surface-consistent marks; tag gap days separately.
Key Takeaways
- Long guts expresses a view on realized versus implied movement; direction alone will not explain P&L.
- Gamma and vega on Long guts flip sign across the book—know which greek you are actually selling or buying.
- Short-vol carry feels smooth until a gap day; count gap frequency in your sample, not just average vol.
- Wing liquidity vanishes when you need to adjust; mids in backtests are not live exits.
- Stress Long guts with vol shocks and widened spreads—breakevens on straddles rarely match live fills.
Learning Tip
For Long guts, tape a sticky note with your max loss day—not max profit day—on the monitor during paper trading.
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