Ethereum (ETH) is 1572806.0× the size of BitcoinII (BC2) by market capitalisation. Their daily returns move barely together (correlation 0.35 across 31 shared trading days). BC2 has been the more volatile of the two, at 215% annualised against ETH's 62%.
BC2ETH
0.35over 31 shared trading days
Measured on daily returns rather than on prices. Two assets that both simply trend upward score near 1.0 on raw prices whether or not they move together, so returns are what answer the question people mean by correlation.
| Metric | BC2 | ETH |
|---|---|---|
| Max drawdown (400d) | -45.9% | -66.5% |
| Risk-adjusted return (90d) | -0.07 | 0.50 |
| Best 30 days (past year) | — | +34.1% |
| Worst 30 days (past year) | — | -44.6% |
Relative strength over 90 days: ETH outperformed BC2 by 24.6% — measured on the BC2/ETH ratio, so it holds regardless of market direction.