The Coffee Can Portfolio is a long-term, low-churn equity investment philosophy introduced by investor and author Robert Kirby in 1984 — named after the American frontier practice of storing valuable assets in a coffee can under the mattress and forgetting about them for years. The philosophy advocates selecting a portfolio of high-quality businesses with strong competitive moats and holding them for an extended period (10 years or more) without any rebalancing, selling, or interference — allowing compounding to work uninterrupted. In the Indian context, the Coffee Can Portfolio approach was popularised by Saurabh Mukherjea and the team at Marcellus Investment Managers — their research identified that Indian companies with consistent revenue growth above 10% and return on capital employed (ROCE) above 15% for at least 10 consecutive years — a remarkably small universe of approximately 25 to 30 companies — delivered extraordinary long-term returns. The Coffee Can approach eliminates the twin costs of trading — transaction fees and the psychological cost of poor timing decisions — while capturing the full compounding benefit of holding high-quality businesses through market cycles. For Indian investors, Coffee Can investing requires rigorous upfront quality screening (avoiding mediocre businesses regardless of short-term price momentum) and the discipline to hold through inevitable corrections — trusting the fundamental quality of the business to drive long-term value creation.
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