A market neutral fund is an investment strategy designed to generate returns independent of overall market direction by holding equal values of long and short positions simultaneously. You buy undervalued securities on the long side and sell overvalued securities short, sizing both positions so their market exposure cancels out. The goal is a portfolio with near-zero beta, meaning its returns are driven by individual security selection rather than whether markets rise or fall.
In 2022, when the S&P 500 dropped more than 19%, many market neutral funds delivered positive returns. That performance difference is the strategy's core value proposition: it aims to make money in any market environment, good or bad.
Zero beta means the fund has no sensitivity to broad market movements. Achieving it requires precise position sizing, not just running equal-sized long and short books.
A fund might identify two technology stocks: Company A, which appears undervalued at $80, and Company B, which appears overvalued at $120. It buys $100,000 of Company A long and shorts $100,000 of Company B. If the entire technology sector drops 15%, both positions fall roughly the same amount. The losses on the long offset the gains on the short, leaving the fund's net return dependent only on whether Company A outperforms Company B on a relative basis, not on what the sector does.
In practice, maintaining true zero beta requires constant monitoring. As stock prices move, the relative size of long and short positions drifts, so managers rebalance regularly to restore balance.
Market neutral funds use two primary methods to identify which securities to go long and which to go short.
Fundamental market neutral managers analyze company financials, management quality, industry dynamics, and competitive positioning to determine whether a stock is mispriced relative to its intrinsic value. They make concentrated bets and research each position deeply. BlackRock's Global Equity Market Neutral Fund uses a fundamental approach, maintaining near-zero beta to both stocks and bonds while seeking returns purely from security selection.
Quantitative market neutral managers build algorithmic models that analyze large datasets, including historical price patterns, earnings data, and macro factors, to identify pricing anomalies across hundreds or thousands of securities simultaneously. AQR Capital Management's Equity Market Neutral Fund, for example, invests long and short across hundreds of companies globally using a diverse set of quantitative investment signals.
These two strategies are related but serve different purposes in a portfolio.
Long-short equity funds typically maintain a positive net long position, meaning they profit when the overall market rises. A fund with 70% long and 30% short exposure has 40% net long bias and will generally rise and fall with markets, just with some dampening. Market neutral funds target near-zero net exposure and are explicitly designed to decouple returns from market direction. The tradeoff is that market neutral funds give up upside participation in strong bull markets in exchange for more consistent, lower-volatility returns across all market conditions.
Market neutral funds are not risk-free. Several risks can undermine the strategy even when the underlying thesis is correct.
Institutional investors, including pension funds, endowments, and foundations, use market neutral strategies as diversifiers within their broader portfolios. The low correlation to equities and bonds makes them appealing during regimes of elevated volatility and rising correlation between traditional assets, as occurred in 2022 and in parts of 2025.
Retail access has expanded through registered mutual funds and exchange-traded funds. The Calamos Market Neutral Income Fund has operated since the 1980s, combining convertible arbitrage and hedged equity approaches. AQR's Equity Market Neutral Fund offers quantitative exposure in a mutual fund wrapper accessible to individual investors.