{"concept":{"id":"https://www.thetrading.tools/concepts/drawdown#term","slug":"drawdown","canonicalUrl":"https://www.thetrading.tools/concepts/drawdown","name":"Drawdown","alternateNames":["max drawdown","maximum drawdown","MDD","peak-to-trough decline"],"category":"Risk & returns","kind":"Risk metric","shortDefinition":"The percentage decline from a prior peak to the current price, and — as max drawdown — the deepest such decline over a period.","definition":"A drawdown is the percentage decline of a price or portfolio value from its highest previous point, measured until the old high is regained. Maximum drawdown (MDD) is the deepest such peak-to-trough decline over a stated window. It measures losses an investor would actually have experienced along the way, which makes it the risk number most portfolios are judged — and abandoned — by.","plainIntro":["Take an investment's price chart and mark its highest point so far. However far the price has fallen below that mark, right now, is its drawdown. If the price is at a record high, the drawdown is zero.","Max drawdown is the worst case in the rear-view mirror: the single deepest fall from any peak to the low that followed it. When someone says \"the 2008 crash was a 57% drawdown,\" they mean an investor who bought at the exact top watched more than half the value disappear before it turned.","The reason people care so much: losses are not symmetric. A 50% fall needs a 100% rise to get back to even. Drawdown measures the hole; the recovery math is what makes deep holes so expensive."],"whyItMatters":["Drawdown is the risk investors actually feel. Volatility is an abstraction; the number that changes behavior is \"how far below my high-water mark am I, and for how long.\" Deep drawdowns are when plans get abandoned, leverage gets called, and mistakes get made — which is why practitioners often size positions from drawdown tolerance rather than from volatility.","The arithmetic is punishingly asymmetric. Recovering a 20% drawdown takes a 25% gain; recovering 50% takes 100%; the S&P 500's 56.5% financial-crisis drawdown required a 130% rally and took four years to complete. This asymmetry, not squeamishness, is the rational case for caring about downside first.","Duration is the underrated half of the measure. A drawdown has depth and length, and the length — time below the old high — is often the harder test. The 2000-02 decline kept the S&P below its peak for over seven years. Comparing two strategies on depth alone hides which one strands capital longest."],"formulas":[{"label":"Drawdown at time t","expression":"DD(t) = P(t) / max(P(0..t)) − 1","explanation":"Current price divided by the highest price seen so far, minus one. Zero at a new high; negative below it. Our published series use daily closing prices, so intraday extremes are not captured."},{"label":"Maximum drawdown","expression":"MDD = min DD(t) over the window","explanation":"The most negative drawdown reading in the period. Always state the window and the sampling frequency — a \"max drawdown\" computed on monthly data will be shallower than the same strategy measured daily."},{"label":"The recovery requirement","expression":"required gain = DD / (1 − DD)","explanation":"The rise needed to regain the old high grows faster than the fall: 20% down needs +25%, 33% down needs +50%, 50% down needs +100%."}],"example":{"title":"A 30% drawdown, start to finish","setup":"Suppose an index climbs to a closing high of 100, slides over months to a close of 70, then rallies back through 100 a year later.","steps":["At the 70 low, the drawdown is 70 / 100 − 1 = −30%.","The recovery requirement is 0.30 / 0.70 ≈ +43%: the index must rise 43% from the low just to reclaim the old high.","When it closes above 100 again, the drawdown returns to zero and the episode is complete — depth −30%, with a duration measured from the old high to the recovery date."],"result":"One completed drawdown episode: −30% deep, recovered.","interpretation":"An investor who bought at 100 was down 30% at the worst point and spent the entire episode below break-even. Anyone who sold near 70 converted a temporary drawdown into a permanent loss — which is the behavioral risk the number exists to describe."},"caveats":["Sampling changes the number. Close-based daily series understate intraday extremes: the S&P 500's 2011 and 2018 declines both exceeded 20% intraday but stopped short of that on closes. Any drawdown claim needs its price basis (close vs intraday, price vs total return) attached.","Nested declines disappear inside bigger ones. Measured from all-time highs, a new episode cannot begin until the prior peak is regained — the S&P's 19% slide in 2011 does not appear as its own episode because the index was still below its 2007 peak. State the peak definition (all-time vs trailing window) or two lists will disagree.","Max drawdown grows with history almost mechanically. A 30-year record will usually contain a deeper MDD than a 3-year record of the same strategy; comparing funds with different track lengths on MDD favors the young one.","Realized drawdown is not a forecast. The deepest decline in a sample is a lower bound on what is possible — every record drawdown was preceded by a shallower record.","Dividends soften the picture. Price-only drawdowns run deeper and longer than total-return drawdowns; the price-based recovery date can overstate the true break-even wait by months or years."],"faq":[{"q":"What is a drawdown in investing?","a":"The percentage an investment sits below its highest previous value. It reads zero at a record high and negative below one, and it stays \"open\" until the old high is regained. Max drawdown is the deepest such decline over a stated period."},{"q":"What is a good maximum drawdown?","a":"It depends entirely on the asset class and window. The S&P 500's deepest close-based drawdown since 1993 is −56.5% (2007-09), and 15%+ episodes have arrived roughly twice a decade — so an equity strategy claiming a single-digit max drawdown over decades either hedges, holds substantial cash, or hasn't been tested by a real bear market."},{"q":"Why do drawdowns take so long to recover?","a":"Because the recovery requirement compounds against you: a 30% fall needs +43%, a 50% fall needs +100%. Add that bear markets often end well below fair-value highs, and time-below-peak stretches — the S&P spent over 7 years below its 2000 peak and about 5.5 years below its 2007 peak on closing prices."},{"q":"Is drawdown the same as loss?","a":"Only for someone who bought exactly at the peak and sold at the low. For everyone else, drawdown measures an unrealized decline relative to a high-water mark. It becomes a permanent loss only when sold; the behavioral danger of deep drawdowns is precisely that they pressure holders into that conversion."}],"sources":[{"name":"Maximum Drawdown","publisher":"Magdon-Ismail & Atiya, Risk Magazine (2004)","note":"The standard analytic treatment of maximum drawdown as a risk statistic.","primary":true},{"name":"Practical Portfolio Performance Measurement and Attribution","publisher":"Carl Bacon / Wiley","note":"The performance-measurement reference in which drawdown, MDD and drawdown-based ratios (Calmar, Sterling) are formally defined.","primary":false},{"name":"S&P 500 drawdown methodology","publisher":"The Trading Tools","href":"/methodology","note":"Price basis, episode rules and timestamps behind the live observation and episode table on this page.","primary":true}],"resources":[{"type":"tool","name":"Bear Market Breadth","href":"/bear-market-breadth","relation":"The cross-sectional version: the daily share of index members sitting 20%+ below their own 52-week highs."},{"type":"tool","name":"Hidden Bear Index","href":"/hidden-bear-index","relation":"Reads the average stock's drawdown (equal-weight RSP) against the cap-weighted index's — the gap is the hidden-bear gauge."},{"type":"tool","name":"Market Repair Flow","href":"/market-repair-flow","relation":"Buckets every stock by drawdown depth and measures the net flow between healthier and worse buckets."},{"type":"dataset","name":"SPY daily history (1993+)","href":"/data/csv/SPY.csv","relation":"The closing-price series behind the live drawdown observation and every episode in the table."}],"relationships":[{"relation":"relatedTo","conceptId":"https://www.thetrading.tools/concepts/breadth-thrust#term","slug":"breadth-thrust","name":"Breadth Thrust","url":"https://www.thetrading.tools/concepts/breadth-thrust","description":"Breadth-thrust rules require a washed-out starting point, and market-wide washouts historically occur deep inside index drawdowns — the thrust is the participation snapback that often marks a drawdown's late innings."},{"relation":"relatedTo","conceptId":"https://www.thetrading.tools/concepts/mean-reversion#term","slug":"mean-reversion","name":"Mean Reversion","url":"https://www.thetrading.tools/concepts/mean-reversion","description":"Mean reversion is the assumption behind treating a drawdown as temporary; whether stretched prices revert toward their average — and at which horizon — decides if buying a drawdown is an edge or a slogan."}],"dataDependencies":["https://www.thetrading.tools/data/csv/SPY.csv"],"cadence":"trading-day","publishedAt":"2026-08-13","reviewedAt":"2026-08-13","modifiedAt":"2026-08-13"},"currentObservation":null,"separationNote":"The concept is the durable definition. currentObservation is a dated measurement produced by the named implementation and may be null when its source is unavailable."}