Prom volatility and risk: how violent it has been
1,338 daily moves since 17 Mar 2023. On a typical day PROM moves 2.1% in one direction or the other; on 1 day in 20 it has lost more than 7.8%, and its deepest fall from a record close was −94%.
Volatility is the standard deviation of daily log returns multiplied by the square root of 365, the usual way to put it on a yearly scale. “1 in 20” and “1 in 100” are the 5th and 1st percentiles of all daily moves, read straight from the history with no model.
The 10 largest one-day falls, and what followed
| Day | Move | Close | 7 days later | 30 days later |
|---|---|---|---|---|
| 18 May 2026 | −34.8% | $1.14 | −3.9% | +1.2% |
| 16 Jan 2026 | −32.3% | $4.22 | −44.6% | −69.5% |
| 26 Oct 2024 | −22.7% | $6.64 | −16.5% | −5.7% |
| 4 Sep 2023 | −21.9% | $4.29 | −11.7% | −6.6% |
| 21 Jul 2026 | −21.8% | $1.52 | +36.9% | +46.0% |
| 12 Apr 2024 | −20.9% | $12.23 | −20.1% | −18.6% |
| 11 Aug 2026 | −20.2% | $1.86 | +2.0% | +191.1% |
| 5 Feb 2026 | −18.6% | $1.10 | +2.8% | −4.2% |
| 6 Oct 2026 | −17.9% | $5.06 | +1.3% | +5.3% |
| 9 Dec 2024 | −17.7% | $6.42 | +3.1% | −14.9% |
After these 10 falls, PROM was higher a week later in 5 of 10 cases and higher 30 days later in 4 of 10. 10 hand-picked extremes are an anecdote, not a test. The full count is on the 10% drop in a day study: 27 scored cases, verdict “weak evidence”.
The 10 largest one-day gains, and what followed
| Day | Move | Close | 7 days later | 30 days later |
|---|---|---|---|---|
| 14 Feb 2024 | +67.8% | $12.69 | +2.1% | +4.2% |
| 25 Oct 2024 | +60.6% | $8.60 | −33.9% | −31.1% |
| 18 Apr 2026 | +48.0% | $2.42 | −16.7% | −52.7% |
| 12 Aug 2026 | +43.9% | $2.68 | −25.7% | +94.4% |
| 25 Jan 2024 | +41.4% | $7.98 | −13.2% | +42.9% |
| 29 Aug 2026 | +35.8% | $6.90 | −26.2% | −8.2% |
| 3 Sep 2023 | +32.9% | $5.50 | −28.2% | −27.3% |
| 21 Feb 2024 | +29.6% | $12.96 | −16.8% | −4.4% |
| 12 Jan 2025 | +28.2% | $6.99 | −18.3% | −25.0% |
| 24 Aug 2026 | +26.2% | $3.63 | +49.3% | +39.5% |
After these 10 gains, PROM was higher a week later in 2 of 10 cases and higher 30 days later in 4 of 10. The full count is on the 10% jump in a day study: 32 scored cases, verdict “weak evidence”.
Moves are from one daily close to the next (00:00 UTC), Binance spot. “Open” means that many days have not passed yet.
Prom and Bitcoin
Over the last 365 days PROM has moved only weakly with Bitcoin: the correlation of their daily moves is 0.21, where 1 means in step and 0 means unrelated. For each 1% Bitcoin moved in a day, PROM moved about 0.69% on average.
| Period | Days | Correlation | Move per 1% of Bitcoin |
|---|---|---|---|
| Last 90 days | 90 | 0.23 | 0.77% |
| Last 365 days | 365 | 0.21 | 0.69% |
| All shared history | 1,338 | 0.27 | 0.72% |
Daily close-to-close moves on the 1,338 days both pairs traded. What PROM did in the week after a Bitcoin shock is tested separately: after Bitcoin drops 5% in a day.