Bitcoin Atom (BCA) and Ethereum (ETH) compared side by side. Their daily returns move loosely in opposite directions (correlation -0.39 across 31 shared trading days). BCA has been the more volatile of the two, at 332% annualised against ETH's 62%.
BCAETH
-0.39over 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 | BCA | ETH |
|---|---|---|
| Max drawdown (400d) | -36.2% | -66.5% |
| Risk-adjusted return (90d) | 0.05 | 0.36 |
| Best 30 days (past year) | — | +34.1% |
| Worst 30 days (past year) | — | -44.6% |
Relative strength over 90 days: BCA outperformed ETH by 16.8% — measured on the BCA/ETH ratio, so it holds regardless of market direction.