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Bitcoin’s 730-day rolling z-standard deviation, a measure of how far price deviates from its long-term power-law trend, has compressed from 1.71 to 0.37. That is a 78% collapse in trend-relative volatility since Bitcoin’s early era, and as of May 18, the current z-score sits at negative 0.80, placing the price below the trend line without breaking it.
Analyst David Eng noted on X that the power law is not breaking. The chaos band is shrinking, and the rising floor is the signal.
Bitcoin is maturing in real time.
BTC’s 730-day trend-relative volatility has collapsed from 1.71 to 0.37.
That is a 78% compression around the long-term power-law trend.
Current z-score: -0.80.
The power law is not breaking.
The chaos band is shrinking.
The rising floor is… pic.twitter.com/O9G9PPGKsA
— David (@david_eng_mba) May 17, 2026
Bitcoin’s one-year realized volatility registered 42% in 2025, half the level recorded in 2021. Charles Schwab’s derivatives research team found that Bitcoin’s average true range as a percentage of price has fallen from 6.8% in 2021 to 3.4% today.
Both Tesla and Nvidia posted higher historical volatility readings than Bitcoin in 2025. Tesla fell 48% from peak to trough that year. Nvidia fell 37%. Bitcoin’s maximum drawdown was 32%.
Fidelity Digital Assets documented 17 separate new all-time lows in Bitcoin’s one-year realized volatility during January 2026 alone, immediately after Bitcoin peaked above $126,000 in October 2025. That sequence, new price highs followed immediately by new volatility lows, has no precedent in Bitcoin’s history. Every prior cycle ended with volatility spiking alongside price at the top. This cycle did the opposite.
Bitcoin’s one-year realized volatility just hit an all-time low of 42%. Historically, these lows have preceded new all-time highs. With institutional demand maturing, the four-year cycle may be fading—will 2026 mark a major shift for @Bitcoin? pic.twitter.com/kTJraOemAL
— Fidelity Digital Assets (@DigitalAssets) January 8, 2026
Exchange-traded products (ETPs) and public companies now hold nearly 12% of Bitcoin’s circulating supply, with the majority of that growth occurring after 2023. Spot Bitcoin exchange-traded funds (ETFs) collectively held 1.3 million BTC as of Jan. 30, 2026, accounting for 6.4% of supply. BlackRock’s IBIT surpassed $75 billion in assets under management in under two years. GLD, the gold ETP equivalent, took nearly seven years to reach the same milestone.
Fidelity Digital Assets argues the mechanism is structural: As Bitcoin’s market cap grows, new capital inflows move the marginal price less. Bitcoin’s market cap at the October 2025 peak of approximately $2.5 trillion was twice its 2021 cycle top, 10 times the 2017 peak, and more than 200 times the 2013 peak. The same dollar of inflow now lands in a pool roughly 200 times deeper than it did a decade ago.
Bitget Research noted in April 2026 that a drop to 42% realized volatility represents extreme compression and that volatility tends to be cyclical. Bitcoin logged comparably boring stretches during prior cycles before breaking sharply in either direction.
Glassnode data from February 2026 showed Bitcoin’s realized profit/loss ratio below 2, a reading associated with fragile liquidity and limited capacity for a sustained rally.
ETF outflows during the March 2026 selloff to $66,317 triggered $2.6 billion in liquidations in a single session. BlackRock’s own research has acknowledged two drawdowns above 25% since IBIT launched, both of which followed periods of compressed volatility.
Data from May 2026 shows something previous compression periods did not: 12% of supply locked in institutionally managed vehicles that do not panic sell. Whether that structural buyer base is enough to absorb the next expansion of the chaos band is the question the chart cannot yet answer.
Bitcoin trades near $76,000 at the time of writing, and the power-law trend is at roughly $82,400. The gap between them is the narrowest it has been since 2020.
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