Tether (USDT) is 18121.4× the size of Xeffy (XEF) by market capitalisation. Their daily returns move barely in opposite directions (correlation -0.07 across 35 shared trading days). XEF has been the more volatile of the two, at 214% annualised against USDT's 1%.
XEFUSDT
-0.07over 35 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 | XEF | USDT |
|---|---|---|
| Max drawdown (400d) | -84.4% | -0.2% |
| Risk-adjusted return (90d) | -0.16 | 0.03 |
Relative strength over 90 days: USDT outperformed XEF by 23.3% — measured on the XEF/USDT ratio, so it holds regardless of market direction.