Ethereum (ETH) is 306386.3× the size of Block (BLOCK) by market capitalisation. Their daily returns move loosely together (correlation 0.44 across 40 shared trading days). BLOCK has been the more volatile of the two, at 83% annualised against ETH's 62%.
BLOCKETH
0.44over 40 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 | BLOCK | ETH |
|---|---|---|
| Max drawdown (400d) | -42.1% | -66.5% |
| Risk-adjusted return (90d) | -0.49 | 0.50 |
| Best 30 days (past year) | — | +34.1% |
| Worst 30 days (past year) | — | -44.6% |
Relative strength over 90 days: ETH outperformed BLOCK by 39.4% — measured on the BLOCK/ETH ratio, so it holds regardless of market direction.