ETH above $2,300
Will the price of Ethereum be above $2,300 on May 9? 13:18:47 UTC · ↻ refresh · poly ↗⚠ Modest directional bet: BUY Polymarket No
Deribit P(No) ≈ 44.3% vs Polymarket 39.0%. EV ≈ +$0.14 per $1.
Directional bet — BUY Polymarket No (no hedge, accept 100% downside)
Pure directional play. You bet that Deribit's RN-prob is closer to truth than Polymarket's price. Max upside if No resolves true, max loss if No resolves false. EV is computed using Deribit's RN-prob — caveat that RN-prob includes risk premium and may differ from real-world probability by 5-15%.
| Stake | Shares | Net cost (incl 2% fee) | If right | If wrong | EV (Deribit RN) |
|---|---|---|---|---|---|
| $100 | 256 | $102.00 | +$154.41 (154%) | -$102.00 (-100%) | $+11.54 (+12%) |
| $500 | 1,282 | $510.00 | +$772.05 (154%) | -$510.00 (-100%) | $+57.71 (+12%) |
| $1,000 | 2,564 | $1,020.00 | +$1,544.10 (154%) | -$1,020.00 (-100%) | $+115.42 (+12%) |
| $5,000 | 12,821 | $5,100.00 | +$7,720.51 (154%) | -$5,100.00 (-100%) | $+577.10 (+12%) |
Polymarket No — best ask $0.390 · Deribit implied P(No) ≈ 44.3% · EV per $1 staked = +$0.135 · Max return 156%. Other side (Yes): EV $-0.143 per $1.
Polymarket book (live)
Deribit hedge (live) bull call spread · width $50
A: Long Polymarket Yes + Short Deribit synth Yes
Bet "Polymarket Yes is too cheap". Both legs zero each other if Yes wins; locked profit = Deribit short credit − Polymarket Yes cost.
| Leg | Per binary | Total at $1k | Outcome flag |
|---|---|---|---|
| BUY Polymarket Yes | $0.650 | −$560.96 | 863 shares |
| SELL Deribit synth Yes | $0.491 | +$423.96 | + $439.04 collateral |
| Edge / binary | mid | realistic |
|---|---|---|
| poly cost − deribit credit | $-1.207 | $-0.159 |
| Net P&L per $1k | $-1,041.81 | $-136.99 |
Expiry payoff at $1k
| ETH at expiry | Polymarket | Deribit | Net |
|---|---|---|---|
| ≤ $2,300 | $0 (Yes loses) | +$423.96 (kept credit) | $-136.99 |
| ≥ $2,350 | +$863.01 (Yes wins) | −$439.04 (max loss) + $423.96 credit | $-136.99 |
| ($2,300, $2,350) | Linear interp; better than both ends thanks to spread tightness | ≥ both ends | |
B: Long Polymarket No + Long Deribit synth Yes — preferred
Bet "Polymarket Yes is too expensive". One leg always pays $1; locked profit = $1 − (Polymarket No cost + Deribit Yes cost).
| Leg | Per binary | Total at $1k | Outcome flag |
|---|---|---|---|
| BUY Polymarket No | $0.390 | −$390.69 | 1,002 shares |
| BUY Deribit synth Yes | $0.608 | −$609.31 | spread debit |
| Edge / binary | mid | realistic |
|---|---|---|
| $1 − (poly_no + deribit_long) | $+0.053 | $+0.002 |
| Net P&L per $1k | $+52.91 | $+1.77 |
Expiry payoff at $1k
| ETH at expiry | Polymarket No | Deribit Yes | Net |
|---|---|---|---|
| ≤ $2,300 | +$1,001.77 | $0 (worthless) | $+1.77 |
| ≥ $2,350 | $0 (No loses) | +$1,001.77 (max) | $+1.77 |
| ($2,300, $2,350) | No expires worthless, Deribit pays partial | ≤ ends (negative carry) | |
Why "delta neutral" is approximate. For TRUE delta-neutrality you need (i) same expiry on both venues (Polymarket 2026-05-09 ≠ Deribit 2026-05-08 — basis risk on the gap), and (ii) tight enough Deribit spreads that synthetic-Yes mid ≈ Polymarket Yes. Excludes Polymarket 2% taker fee (~$20/$1k), gas (~$0.50), Deribit margin haircut.