Will the highest temperature in Shanghai be 20°C on November 8?
1 of 2 top Polymarket traders hold No (50%) · No at 52¢ · $21 held · ends Nov 8
⚖️
Neutral
No
2
No 50%
$20.85
$0.02
Research grade
NeutralNo at 52%
No measured edge, which here means a loss: the plain consensus (5+ holders, 60 %+, held to resolution) lost −3.0 % a trade after costs out of sample in the full-year test (n 86,296, 95 % CI −3.6 to −2.4 %).
- Consensus under 60 %Every backtest started at 60 %+ of the holders; below that nothing was measured.
- Fewer than 5 holdersEvery backtest needed 5+ holders; with fewer nothing was measured.
- Side priced 50–60¢Full year, out of sample: 0.50–0.70 lost −2.9 % a trade (n 23,546, 95 % CI −3.9 to −1.9).
The rules come from our Oct 22 2026 backtest (one entry per market, held to resolution, after a 1¢ half-spread and Polymarket's taker fees). Our full-year test without hindsight (Oct 26 2026) found none of them profitable out of sample, and the plain consensus lost −3.0 % a trade. The grade describes the market; it is not a forecast, not an edge and not advice.
Smart Money Signal
1 of 2 top traders (50%)1 holds an outcome priced under 50%2 small positions dimmed (<$100 invested)
Outcome Probabilities
Smart Money Breakdown by Outcome
| Trader | Position | Invested | Value | PnL | Record |
|---|---|---|---|---|---|
PO Poligarch<$100 | Noavg 58.2¢ | $20.34 | $18.65 | -$1.69 | 54% 10730-9241 (19971) |
12 123987456CTR<$100 | Yesavg 9.7¢ | $0.49 | $2.2 | +$1.71 | 42% 2420-3373 (5793) |
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EV Calculator
Consensus % is how many tracked traders hold a side, not a win probability.
52.0¢ price + 1.0¢ spread + 1.2¢ fee (Other / General 5%). Win more often than this and the bet pays.
A market order pays the taker fee and crosses the spread (assumed 1.0¢); a limit order pays no fee but may not fill. The fee category is a guess from the title.