Crypto Volatility and Drawdowns Explained: Bitcoin vs Ethereum vs the S&P 500
Crypto volatility is the reason the same asset can be the best and the worst investment of a decade depending on the day you bought it. Everyone knows crypto is "volatile"; far fewer people can say what that means as a number, how it compares to stocks, or how it translates into the drawdowns they will actually have to sit through. This guide defines the three risk metrics on every Stoxly crypto page — annualized volatility, maximum drawdown and distance from the all-time high — and compares Bitcoin, Ethereum and the S&P 500 using numbers computed through the same pipeline that powers the 10-point crypto checklist.
Annualized volatility: how wild is the ride?
Volatility is the standard deviation of returns — a measure of how far typical monthly moves stray from the average move. Stoxly computes it from month-end prices over the last three years and annualizes it (multiplying the monthly figure by the square root of twelve), so it can be compared across assets and with the figures you see for stock indices.
A rough way to read it: over a year, an asset will land within one volatility of its expected return about two thirds of the time. At 15% volatility, a "normal" year ranges from roughly −15% to +15% around the trend; at 75%, a normal year ranges from −75% to +75%. The number does not tell you which direction — only how large the surprises tend to be.
Stoxly's pass line for crypto is 80%. That is deliberately generous compared with the 25% line used for ETFs, because even the most established crypto-assets run at three to four times equity volatility. Above 80%, a position can halve within weeks with no change in the underlying story, which makes position sizing rather than analysis the dominant factor in the outcome.
Maximum drawdown: how bad did it get?
Volatility describes typical moves; drawdown describes the worst one. Maximum drawdown is the largest peak-to-trough decline over a period — the loss an investor who bought at the worst possible moment and held through the bottom would have seen. Stoxly measures it over five years of month-end prices, which understates intraday extremes but captures the shape of a full cycle.
Drawdown is the number that actually determines whether people stay invested. A 50% drawdown requires a 100% gain to recover; an 80% drawdown requires a 400% gain. Knowing in advance that 70–90% drawdowns are normal for crypto in a bear market — not a sign that something broke — is the difference between a plan and a panic. Stoxly shows max drawdown for context and does not score it, because a deep historical drawdown says more about the asset class than about any single asset's quality.
Distance from the all-time high
The third metric is the simplest: how far below its record price is the asset today? It is shown on Stoxly pages as a percentage below the all-time high, and like drawdown it is context, not a score. A coin 90% below its peak might be a bargain or a dead project — the metric cannot distinguish the two. What it does well is calibrate expectations: an asset 40% below its high needs a 67% rally to get back there, one 90% below needs 900%.
The numbers: Bitcoin vs Ethereum vs the S&P 500
All figures below were computed on 16 September 2026 from Yahoo Finance month-end prices through Stoxly's crypto and ETF pipelines. The S&P 500 is represented by SPY, the largest S&P 500 ETF; its returns include dividends.
| Metric (5y monthly data) | Bitcoin (BTC) | Ethereum (ETH) | S&P 500 (SPY) |
|---|---|---|---|
| Annualized volatility (3y) | 48.7% | 72.5% | 12.3% |
| Maximum drawdown (5y) | −73.0% | −77.0% | −23.9% |
| Distance from all-time high | −39.9% | −51.4% | n/a |
| 1-year return | −30.8% | −37.6% | +12.0% |
| 3-year return p.a. | +29.8% | +9.7% | +23.3% |
| Stoxly volatility check (< 80%) | Pass | Pass | Pass (< 25% ETF rule) |
Three things stand out. First, even Bitcoin — the calmest major crypto-asset — ran at four times the volatility of the S&P 500 and suffered a drawdown three times as deep. Second, Ethereum is materially more volatile than Bitcoin, which is typical: smaller and younger networks carry more risk, and most altcoins sit well above Ethereum. Third, the return columns show the cost of timing. Over three years Bitcoin outperformed the S&P 500 handily; over the last one it lost a third of its value while the index gained. Both statements are true at once, and which one you experienced depended entirely on your entry date.
What the numbers mean for position sizing
Volatility is not an argument against owning an asset; it is an input to how much of it to own. A common rule of thumb is to size positions so that a full historical drawdown would cost an amount you can tolerate. Using the table: a 10% portfolio allocation to Bitcoin that suffers a 73% drawdown costs 7.3% of the portfolio — painful but survivable. The same 10% in a small altcoin with a 95% drawdown costs 9.5%, essentially the whole position, and a 30% allocation would cost more than most people can hold through.
Two further habits help. Rebalance on a schedule rather than on emotion, so that a doubling in crypto does not silently turn a 10% allocation into 25%. And read volatility together with the liquidity checks: high volatility in a liquid asset is a wild ride; high volatility in an illiquid one is a trap, because the exit closes exactly when you need it.
How Stoxly scores it
Annualized volatility below 80% is one of the ten checks in the crypto analysis. The 1-year and 3-year returns are two more, both scored simply as positive or negative in dollar terms. Maximum drawdown and distance from the all-time high are shown alongside them as informational context. Failing the volatility check while passing the liquidity and supply checks produces the "Highly Volatile" verdict — a description, not a recommendation, that tells you the dominant risk in the position is the size of the swings rather than the quality of the network.
FAQ
What is a normal volatility for cryptocurrency?
Bitcoin has typically run between 45% and 70% annualized over three-year windows, Ethereum between 60% and 100%, and most altcoins above 100%. For comparison, broad stock indices sit around 12–20%. Stoxly's crypto pass line is 80%, generous by equity standards but a real dividing line between established assets and the rest of the market.
Why is maximum drawdown more important than volatility for investors?
Because drawdown is what you actually have to live through. Volatility is a statistical summary of typical moves; maximum drawdown is the specific worst-case decline that tests whether you will hold or sell at the bottom. It also drives the recovery maths: a 75% drawdown needs a 300% gain to break even, which can take years even for an asset that ultimately recovers.
Is Bitcoin less volatile than Ethereum?
Historically yes, and consistently so. In the data pulled for this article, Bitcoin's three-year annualized volatility was 48.7% against Ethereum's 72.5%, and its five-year drawdown was slightly shallower. Larger, older networks tend to be calmer because their holder base is broader and their liquidity deeper — the same pattern holds between Ethereum and the smaller assets below it.
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This article is for educational purposes only and is not financial advice. Crypto-assets are highly volatile and you can lose your entire investment.
For educational purposes only — not financial advice.