Risk & Modeling

Drawdown

TL;DR

Drawdown is the peak-to-trough decline in portfolio value before a new high is reached. For retirees, drawdowns are especially dangerous because ongoing withdrawals during a drawdown permanently remove capital, making full recovery much harder — or impossible.

A drawdown measures the decline from a portfolio's peak value to its lowest point before recovering to a new high. Expressed as a percentage, a 30% drawdown means the portfolio fell from its highest point to a value 30% lower. Drawdowns are the most visceral measure of investment risk — they represent the actual loss an investor experiences, not just a statistical probability.

How It Works

Drawdown is measured from peak to trough:

Drawdown % = (Trough Value − Peak Value) / Peak Value × 100

A $1,000,000 portfolio that drops to $650,000 before recovering has experienced a 35% drawdown.

Critical asymmetry: recovering from a drawdown requires a larger percentage gain than the original loss:

DrawdownGain Needed to Recover
-10%+11.1%
-20%+25.0%
-30%+42.9%
-40%+66.7%
-50%+100.0%

A 50% drawdown requires a 100% gain just to break even — and that's without any withdrawals. For a retiree pulling $40,000/year from a portfolio that just dropped 50%, recovery becomes an uphill battle.

Why It Matters for Retirement Planning

Drawdowns interact with retirement withdrawals to create a compounding problem:

  1. Portfolio drops → the same dollar withdrawal represents a larger percentage of the shrinking portfolio
  2. More shares are sold at depressed prices to meet withdrawal needs
  3. Those shares can't participate in the eventual recovery
  4. The portfolio's recovery capacity is permanently impaired

This is the mechanism behind sequence-of-returns risk. A deep drawdown early in retirement — even if markets fully recover afterward — can permanently alter the portfolio's trajectory.

Dynamic spending strategies mitigate this by reducing withdrawals during drawdowns, preserving more shares to participate in recovery. The bucket strategy addresses it differently — by funding near-term expenses from cash reserves, avoiding the need to sell equities at depressed prices.

A Practical Example

Two retirees both have $1,000,000 and withdraw $40,000/year. Both experience a 35% drawdown in year 2, followed by an immediate 25% recovery in year 3.

No WithdrawalsWith $40,000/year Withdrawals
Year 1 (peak)$1,000,000$1,000,000
Year 2 (-35%)$650,000$610,000
Year 3 (+25%)$812,500$722,500
Recovery shortfall$187,500$277,500

The withdrawing retiree is $90,000 worse off — not just from the $80,000 withdrawn over two years, but from selling assets at depressed prices. This gap widens with each passing year, making fat-tail modeling and stress testing essential for realistic retirement projections.

Frequently Asked Questions

What is the worst drawdown in stock market history?
The U.S. stock market's worst drawdown was approximately 86% during the Great Depression (1929-1932). More recently, the Global Financial Crisis saw a 57% peak-to-trough decline (2007-2009), and the dot-com bust produced a 49% drawdown (2000-2002). A balanced 60/40 portfolio has historically experienced maximum drawdowns of 25-35%.
How long does it take to recover from a drawdown?
Recovery time depends on the depth of the drawdown and subsequent returns. The 2008-2009 drawdown of 57% took about 5.5 years to fully recover. The 2000-2002 drawdown took roughly 7 years. For retirees making withdrawals during recovery, the effective recovery time is even longer because the portfolio must overcome both the loss and ongoing withdrawals.
Why are drawdowns worse for retirees than for accumulators?
Accumulators benefit from buying more shares at lower prices during drawdowns (dollar-cost averaging). Retirees do the opposite — they sell shares at depressed prices to fund withdrawals, permanently removing capital that won't participate in the recovery. This is sequence-of-returns risk in action.