Which stablecoin holds $1.00 most reliably. Rolling 30-day score (0–100) per coin, based on mean absolute price deviation from $1.00 using daily high/low data and depeg event count.
As of October 11, 2026, the average peg score across 16 tracked USD stablecoins read 97 of 100. USDG held the steadiest peg at 99.7; USDF ranked last at 74.5.
Depeg events are split by direction, downside (<$0.995) signals redemption pressure; upside (>$1.005) typically reflects demand surge or minting lag, not credit risk.
Mean deviation <0.02% from $1.00, zero or near-zero depeg events in 30 days.
Occasional micro-deviations or isolated depeg events. Normal for smaller-cap coins or algorithmic designs.
Persistent deviation from $1.00 or multiple depeg events in the window.
Formula: Score = max(0, min(100, 100 − mean_abs_deviation × 2,000 − depeg_events × 2))
Depeg event: any day where the intraday high/low deviation from $1.00 exceeds $0.005 (0.5%). Classified as downside (redemption pressure signal) or upside (demand/minting-lag signal).
Price data: daily open/high/low/close for the top 30 USD-pegged stablecoins. High/low capture intraday depegs that closing-price-only metrics miss.
Window: rolling 30-day, minimum 7 days of data required. Updated daily at 15:40 UTC.
As of Oct 2026, USDG leads with a 30-day peg stability score of 99.7/100. The score reflects rolling mean absolute price deviation from $1.00 and the number of days deviation exceeded 0.5 cents.
A depeg event is any day where a coin's aggregated price deviates more than $0.005 (0.5%) from $1.00. Minor intraday fluctuations within the band do not count.
Score = max(0, min(100, 100 − mean_abs_deviation × 2,000 − depeg_events × 2)). A coin pricing at exactly $1.00 every day scores 100. Each 0.05% of average daily deviation deducts 1 point; each depeg event deducts 2 additional points.
Both coins routinely trade between $0.9997 and $1.0003. This micro-deviation is normal: bid-ask spreads, arbitrage routing between CEX and DEX markets, and minor settlement latency. It does not signal redemption risk unless sustained below $0.995.
No. Peg stability measures price consistency, not solvency or reserve quality. Always assess it alongside reserve composition, issuer concentration risk, and redemption pressure data.