Annualized 30-day realized volatility (the standard deviation of daily log returns over a trailing 30 days, ×√365) aligned by coins issued, so you can compare how volatile ZEC and BTC were at equivalent points in their 21M-coin emission schedules.
Hover shows the calendar date each chain was at that issuance. Higher = larger daily price swings. Optional 50-week moving average smooths the noise. The time-range filter does not apply.
Volatility vs BTC @ issuance was 1.30× on 2026-10-10, the last full day of data. That is 24.1% lower than 28 days ago, when it was 1.71×.
This chart is plotted against coins issued, not date, so the two chains are compared at equivalent emission.
🔗 permalink ⇆ compareThis plots 30-day realised volatility against coins issued rather than the date. At the same calendar moment Bitcoin is sixteen years into its emission schedule and Zcash ten, so a date axis would compare two different stages of maturity — a young network against a mature one and call it a fair fight.
Both chains cap at 21M, which is the only reason this alignment means anything. At any x, both had mined the same fraction of their total supply; the question the chart asks is what each looked like at that point in its own life.
So nothing here is a statement about today. Two points at the same x are years apart on the calendar, and the right-hand end of the Zcash line is the present while the same x on the Bitcoin line is somewhere in its past.
Volatility is annualised from daily log returns over a trailing 30 days. That window is short: one violent week dominates it for a month afterwards, so treat a single spike as one event rather than a change in character.
For the same measures on an ordinary date axis, see supply and price.