Highest ROI trades on Polymarket
The biggest return-on-cost bets that hit — someone put real money on a long-shot and it paid. Ranked by ROI (profit ÷ cost), from every resolved position on-chain. Click any trader to explore their full history.
Top trade
gr…in turned $989.05 into $11.2K
10.4× ROI
| # | Trader | Market | Entry | Cost | Profit | ROI | Resolved |
|---|---|---|---|---|---|---|---|
| 1 | gr…in | S&P 500 (SPX) Opens Up or Down on May 18? | 8.8¢ | $989.05 | +$10.2K | 10.4× | May 18, 2026 |
| 2 | Ca…Up | Will Tesla (TSLA) close above $370 on March 20? | 11.0¢ | $720.04 | +$5.1K | 7.1× | Mar 21, 2026 |
| 3 | Ca…Up | Will Google (GOOGL) close above $390 on May 11? | 12.7¢ | $541.50 | +$3.7K | 6.9× | May 11, 2026 |
| 4 | su…ro | Will Meta (META) close above $610 on May 13? | 13.0¢ | $576.44 | +$3.8K | 6.7× | May 13, 2026 |
| 5 | Ks…vs | S&P 500 (SPX) Up or Down on March 2? | 13.4¢ | $1.1K | +$7.4K | 6.4× | Mar 3, 2026 |
| 6 | r…8 | S&P 500 (SPX) Up or Down on April 7? | 13.6¢ | $549.54 | +$3.5K | 6.4× | Apr 7, 2026 |
Find traders with real, repeatable skill
One huge ROI can be luck. Polyrank ranks the 2.8M-wallet field by calibration, edge, and risk — so you can follow the genuinely skilled, not the lucky.
ROI = realized profit ÷ cost basis on a single resolved position. Past performance does not predict future results. Not financial advice.