Tether (USDT) is 615.0× the size of First Digital USD (FDUSD) by market capitalisation. Their daily returns move loosely together (correlation 0.53 across 60 shared trading days). FDUSD has been the more volatile of the two, at 1% annualised against USDT's 1%.
FDUSDUSDT
0.53over 60 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 | FDUSD | USDT |
|---|---|---|
| Max drawdown (400d) | -0.6% | -0.2% |
| Risk-adjusted return (90d) | -0.06 | -0.05 |
| Best 30 days (past year) | +0.5% | — |
| Worst 30 days (past year) | -0.4% | — |
Relative strength over 90 days: USDT outperformed FDUSD by 0.0% — measured on the FDUSD/USDT ratio, so it holds regardless of market direction.