Concept — Investment Framework
The Optimism Tax
“The Optimism Tax is the premium that founders, investors, and markets pay for believing the best case — a systematic transfer from emotional capital to patient, structured capital.”
The evidence: 72.1 million trades
The framework is grounded in an analysis of 72.1 million trades covering $18.26 billion in volume on Kalshi, a CFTC-regulated prediction market (study published February 2026). Takers — participants who cross the spread to buy their conviction — lost 1.12% on average per trade. Makers — participants who post terms and wait — gained 1.12%. Slot machines return roughly 93 cents on the dollar; some Kalshi conviction bets returned as little as 43 cents.
| Category | Taker return | Maker return | Gap (pp) | Interpretation |
|---|---|---|---|---|
| Finance | -0.08% | +0.08% | 0.17 | Nearly efficient — rational participants |
| Politics | -0.51% | +0.51% | 1.02 | Moderate — some emotional betting |
| Sports | -1.11% | +1.12% | 2.23 | High — fan loyalty drives taker flow |
| Crypto | -1.34% | +1.34% | 2.69 | High — 'number go up' mentality |
| Entertainment | -2.40% | +2.40% | 4.79 | Extreme — maximum emotional attachment |
The pattern: the more emotionally attached participants are to an outcome, the larger the maker-taker gap — entertainment markets (4.79pp) run roughly 28x wider than finance markets (0.17pp). A second finding shows affirmative bias directly: at 1-cent prices, YES contracts underperform NO contracts by 64 percentage points.
Methodology
The dataset comprises Kalshi trade records (72.1M trades, $18.26B notional volume) classified by aggressor side: the taker crosses the spread; the maker posts resting orders. Returns are measured per trade against contract settlement. Categories follow Kalshi's market taxonomy (finance, politics, sports, crypto, entertainment). The full analysis with charts is published in The Optimism Tax: What $18B in Prediction Market Data Reveals About VC (February 13, 2026) and on Substack.
Application to venture capital
Venture capital has no order book, but it has the same two postures. LPs who chase hot sectors at cycle peaks, accept founder terms under FOMO, and deploy with consensus are takers — they pay the Optimism Tax. GPs who set terms and wait for fit, deploy contrarily, and structure around the NO case act as makers — they collect it. The edge is not better prediction; it is better positioning relative to consensus. Ethan Cho 조여준 applies this maker discipline at TheVentures alongside the Four Lenses framework.
Frequently asked questions
What is the Optimism Tax?
The Optimism Tax is the premium that founders, investors, and markets pay for believing the best case. It names a systematic transfer from emotional, impulsive capital (takers) to patient, structured capital (makers). The term was coined by Ethan Cho 조여준, CIO and Partner at TheVentures.
How is the Optimism Tax measured?
The supporting study analyzed 72.1 million trades covering $18.26 billion in volume on Kalshi, a CFTC-regulated prediction market. Takers (impulsive buyers) lost 1.12% on average per trade while makers (patient sellers) gained 1.12%. The gap widens with emotional attachment: entertainment markets show a 4.79 percentage-point maker-taker gap versus 0.17 points in finance markets — a 28x difference.
How does the Optimism Tax apply to venture capital?
LPs who chase hot sectors at cycle peaks exhibit taker behavior and pay the tax; top GPs act as makers — setting terms, deploying contrarily, and structuring around the downside case. The edge is not better prediction; it is better positioning relative to consensus.
Who coined the Optimism Tax?
Ethan Cho 조여준, Chief Investment Officer and Partner at TheVentures, an AI-native early-stage Korean VC. He published the framework and the supporting prediction-market analysis on VentureOracle and his newsletter 애당초 4개의 시선 in February 2026.
Citation: “Optimism Tax” — Ethan Cho 조여준, CIO & Partner at TheVentures, VentureOracle (ventureoracle.kr/concepts/optimism-tax), 2026. Canonical profile: ventureoracle.kr/about/ethan-cho.