Arbitrum vs 
Optimism
Arbitrum (ARB) has a market cap of $906.19M, 5.1× that of Optimism (OP) at $176.26M, as of 2026-11-08 23:21 UTC.
At Arbitrum's market cap, one OP would be worth $0.5095 — 5.1× its current price of $0.0991. This is arithmetic, not a forecast.
Over 24 hours ARB is -0.47% and OP is -2.56%.
Over 30 days, ARB lost 8.21% while OP lost 25.21%.
Over 90 days, ARB gained 109.36% while OP gained 8.31%.
Annualised 90-day volatility: ARB 138%, OP 116% — ARB has been the more volatile asset.
Their daily returns are moderately correlated over 90 days (0.63).
Updated · Market data, not investment advice.
| Metric | Arbitrum (ARB) | Optimism (OP) |
|---|---|---|
| Price | $0.1677 | $0.0991 |
| Market cap | $906.19M | $176.26M |
| Rank | #55 | #121 |
| 24h volume | $70.79M | $14.96M |
| 24h change | -0.47% | -2.56% |
| 7d change | +1.29% | -14.50% |
| 30d change | -8.21% | -25.21% |
| 90d change | +109.36% | +8.31% |
| Volatility (90d, annualised) | 138% | 116% |
| Circulating supply | 5.40B | 1.78B |
| Max supply | No cap | 4.29B |
| Fully diluted value | $1.68B | $425.63M |
| Correlation of daily returns (90d) | 0.63 | |
90-day performance, rebased to 100
Binance daily closes. Past performance doesn't predict future returns.
Frequently asked questions
What would OP be worth with ARB's market cap?+
$0.5095 per OP, based on Optimism's current circulating supply. This is arithmetic, not a forecast.
Is Arbitrum bigger than Optimism?+
Yes. Arbitrum's market cap is $906.19M versus $176.26M for Optimism (2026-11-08 23:21 UTC).
Which performed better over the last 30 days, ARB or OP?+
Arbitrum: -8.21% vs Optimism: -25.21% (Binance daily closes, 2026-11-08 23:21 UTC).
Do ARB and OP move together?+
Their 90-day correlation of daily returns is 0.63 (1 = move in lockstep, 0 = unrelated) — moderately correlated.
Where does this data come from?+
Live prices and history from Binance spot markets; market cap and supply from CoinLore. Past performance doesn't predict future returns.