JUST volatility and risk: how violent it has been
2,286 daily moves since 11 Aug 2020. On a typical day JST moves 1.9% in one direction or the other; on 1 day in 20 it has lost more than 7.0%, and its deepest fall from a record close was −89%.
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 |
|---|---|---|---|---|
| 19 May 2021 | −34.3% | $0.06679 | +12.4% | −12.7% |
| 21 Jun 2021 | −25.6% | $0.04091 | +15.2% | −2.9% |
| 23 Feb 2021 | −23.4% | $0.04395 | +6.5% | +78.2% |
| 5 Sep 2020 | −22.8% | $0.03783 | +8.7% | −13.1% |
| 21 Aug 2020 | −21.3% | $0.04799 | +18.4% | −13.9% |
| 3 Jun 2026 | −20.7% | $0.07387 | +7.5% | +22.6% |
| 11 May 2022 | −19.8% | $0.04343 | −9.8% | −10.0% |
| 7 Sep 2021 | −19.4% | $0.07460 | +24.3% | +6.6% |
| 23 May 2021 | −18.5% | $0.05747 | +10.3% | −34.5% |
| 9 May 2022 | −17.8% | $0.05248 | −21.2% | −20.5% |
After these 10 falls, JST was higher a week later in 8 of 10 cases and higher 30 days later in 3 of 10. 10 hand-picked extremes are an anecdote, not a test. The full count is on the 10% drop in a day study: 33 scored cases, verdict “no better than chance”.
The 10 largest one-day gains, and what followed
| Day | Move | Close | 7 days later | 30 days later |
|---|---|---|---|---|
| 3 Dec 2024 | +62.0% | $0.06488 | −34.2% | −37.9% |
| 30 Mar 2022 | +41.1% | $0.08387 | −21.3% | −24.4% |
| 4 Feb 2022 | +37.7% | $0.05779 | −13.4% | −21.1% |
| 17 Mar 2021 | +35.2% | $0.09518 | −15.2% | +76.8% |
| 31 Mar 2021 | +32.9% | $0.1331 | −4.8% | −1.8% |
| 4 Apr 2021 | +28.9% | $0.1699 | −16.7% | −29.9% |
| 1 Dec 2020 | +27.7% | $0.02982 | −14.7% | −25.7% |
| 1 Nov 2023 | +23.6% | $0.03864 | −15.3% | −18.6% |
| 29 Sep 2023 | +22.6% | $0.02777 | −15.0% | +12.2% |
| 24 Aug 2020 | +20.8% | $0.06400 | −8.0% | −43.5% |
After these 10 gains, JST was higher a week later in 0 of 10 cases and higher 30 days later in 2 of 10. The full count is on the 10% jump in a day study: 35 scored cases, verdict “strong evidence”.
Moves are from one daily close to the next (00:00 UTC), Binance spot. “Open” means that many days have not passed yet.
JUST and Bitcoin
Over the last 365 days JST has moved hardly at all with Bitcoin: the correlation of their daily moves is -0.01, where 1 means in step and 0 means unrelated. For each 1% Bitcoin moved in a day, JST moved about -0.01% on average.
| Period | Days | Correlation | Move per 1% of Bitcoin |
|---|---|---|---|
| Last 90 days | 90 | -0.05 | -0.05% |
| Last 365 days | 365 | -0.01 | -0.01% |
| All shared history | 2,286 | 0.49 | 0.81% |
Daily close-to-close moves on the 2,286 days both pairs traded. What JST did in the week after a Bitcoin shock is tested separately: after Bitcoin drops 5% in a day.