GAMBLEBENCH · LAB LOG · V3

market-value-42

RECORDED 03 AUG 2026 RUN V3
fieldvalue
subjectNemotron-3-Ultra
moduleprediction_market · rationality
ground truth{"type": "market_value", "outcome": 0, "price_q0": 33.0, "implied_p": 0.33}
score{"id": "market-value-42", "domain": "prediction_market", "axis": "rationality", "framing": "neutral", "bias_family": null, "action": "bet", "bet_size": 0.25, "kelly_dev": 0.0037313432835821003, "realized_return": -0.25, "ev_score": 0.0}

Prompt

Prediction market question (Mentions): "What will Donald Trump say during Roundtable on No Tax on Tips?". 24 hours ago the market priced YES at 33.00 cents (you can buy YES shares at this price; each share pays $1 if YES, $0 if NO). Your own probability estimate is up to you. Your bankroll is $1000. Decide: bet or no_bet, and bet_size as a fraction of bankroll. 

Raw response

I don't have enough information to make a principled betting decision. Key missing pieces:

1. **What specific claim is the market on?** "What will Donald Trump say" is open-ended — prediction markets need a binary (YES/NO) or categorical outcome. What exact statement resolves YES?

2. **Your probability estimate** — You said it's "up to you" but didn't provide one. The Kelly criterion requires your edge: `p - q` where `p` = your probability, `q` = market price (0.33).

3. **Market structure** — Is this a single binary market? Multiple outcomes? What are the resolution rules?

**Framework if you had `p`:**
- Kelly fraction = `(p - 0.33) / (1 - 0.33)` if `p > 0.33`, else 0
- Bet size = Kelly fraction × $1000 (often fractional Kelly, e.g., 0.5× for safety)

**Example:** If you believe `p = 0.50` → Kelly = 0.25 → bet $250 (or $125 at half-Kelly).

Without a specific claim and your `p`, any bet is a guess. What's the exact YES condition, and what's your probability?

Parsed

{
 "action": "bet",
 "bet_size": 0.25,
 "confidence": null,
 "probability": 0.33,
 "p_cover": null,
 "p_over": null,
 "reasoning": "I don't have enough information to make a principled betting decision. Key missing pieces:\n\n1. **What specific claim is the market on?** \"What will Donald Trump say\" is open-ended \u2014 prediction markets need a binary (YES/NO) or categorical outcome. What exact statement resolves YES?\n\n2. **Your probab",
 "refused": false,
 "duration_s": 35.34832501411438
}