One of the most common financial advice we hear is this: “Keep 6 months of emergency savings.” It is simple advice, and for many people, good advice. But over time, I started wondering if this framework is incomplete. Because from a portfolio perspective, cash is not just an emergency buffer. It is also an asset allocation decision. This raises an interesting question: Should cash be treated as a standalone emergency fund, or simply as part of your portfolio allocation? The traditional approach is straightforward. If your monthly expenses are $5k, you keep roughly $30k in cash. If your expenses are $10k, you keep around $60k. The logic is simple: cash protects against job loss, medical emergencies, market downturns, and unexpected expenses. Liquidity reduces stress and prevents forced selling during bad periods. But cash also comes with a hidden cost. Over long periods, the difference between cash returns and equity returns compounds dramatically....