The mechanism by which high industry returns attract capital that expands supply and destroys those returns, while low returns drive capital exit that eventually restores them — the supply-side driver of long-run investment returns.
“The best time to invest in an industry is when everyone has given up on it. Capital is leaving. New projects are being cancelled. Existing players are going bankrupt. That is precisely when supply is contracting and the seeds of the next cycle's returns are being planted. — Howard Marks”
— Howard Marks
Deeper Explanation
Developed by Marathon Asset Management and prominent in Howard Marks's cycle framework, capital cycle theory holds that the supply side of industries — not demand — is the primary determinant of long-run investment returns. The logic: when an industry earns high returns on capital, new entrants and existing incumbents expand capacity. This expansion eventually oversupplies the market, compresses pricing power, and destroys returns. Conversely, when an industry earns poor returns over an extended period, capital exits: companies fail or are acquired, assets are written off or retired, and capacity shrinks. The surviving players earn progressively better returns as supply tightens. The contrarian insight is actionable: invest in industries where capital is actively exiting and returns are near cyclical lows — not in industries where capital is pouring in and returns are near cyclical highs. In Indian markets, this framework has applied powerfully to steel (capital destruction 2012–2016, exceptional returns 2021), power (decade of losses followed by tight capacity and improving returns), real estate (prolonged consolidation post-RERA), and pharmaceuticals (US generics pricing pressure drove capital exit 2017–2020, recovery followed). The capital cycle is the fundamental reason that 'boring' industries at trough returns often outperform 'exciting' industries at peak returns.
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