Drawdown

Drawdown is the peak-to-trough decline in the value of a portfolio before it recovers to a new peak. It is one of the most useful measures of investment downside risk — more practically informative than volatility alone, because it captures the actual experience of holding the portfolio through bad periods.

How it is measured

Drawdown is expressed as a percentage of the previous peak. A portfolio that reaches $1,000,000 and then declines to $700,000 has experienced a 30% drawdown. The drawdown ends when (and if) the portfolio recovers to the previous peak.

Two related metrics are commonly reported alongside drawdown:

Maximum drawdown is the largest peak-to-trough decline experienced over a period. For long-horizon equity portfolios, historical maximum drawdowns of 40–55% are not unusual.

Drawdown duration is the time from the previous peak to the eventual recovery to the same peak. For deep equity drawdowns, recovery can take 3–7 years or longer in real terms.

Why it matters more than volatility

Standard deviation (volatility) is symmetric — it treats upside and downside variability equally. Drawdown is asymmetric — it captures the actual experience of loss, which matters far more than upside variability for most investors.

Two portfolios with the same volatility can have very different drawdown profiles. A portfolio with frequent small declines may have similar volatility to one with rare large declines, but the experience of holding them is fundamentally different. The latter exposes the investor to large drawdowns that test psychological discipline and may force decisions at inopportune moments.

Drawdown is therefore the more honest representation of risk for retail investors. Knowing that a portfolio could decline 50% and take five years to recover changes how the portfolio is sized, how much it is leveraged, and what cash buffer the investor needs.

Drawdown and retirement income

Drawdown matters most acutely for retirees drawing income from a portfolio. A 40% drawdown experienced in the first year of retirement is far more damaging than the same drawdown experienced in year twenty, because the early-retirement drawdown forces withdrawals at depressed prices on capital that does not have time to recover.

This is the mechanic behind sequence of returns risk. Drawdown is the input; sequence risk is the consequence for retirement plans.

Typical historical drawdowns

For broad reference points across major asset classes over recent decades:

• Diversified developed-market equity portfolios: max drawdowns of 40–55%, recovery typically 2–7 years
• Balanced 60/40 stock-and-bond portfolios: max drawdowns of 25–35%, recovery typically 1–4 years
• Investment-grade bond portfolios: max drawdowns of 10–20%, recovery typically 1–3 years
• Cash and short-term bonds: small nominal drawdowns but real drawdowns can be substantial during high-inflation periods

Drawdowns within these ranges are normal experience for the asset class, not unusual events. Plans that cannot tolerate them are mismatched to the asset class held.