Every financial advisor I’ve ever talked to has frowned at my cash position. Three to six months of expenses, they say, then put the rest to work. Cash is a drag. Cash loses to inflation. Cash is lazy money. The spreadsheet always agrees with them.
The spreadsheet doesn’t know about the broken HVAC in August, the layoff that came two months earlier than the news predicted, or the deal that closed because I could move quickly while everyone else needed a wire from a brokerage. I keep more cash than the textbook recommends, and I’ve never regretted it once.
Liquidity has a return that doesn’t show up in yield
The expected return of cash is the interest rate, full stop. The actual return includes optionality — the ability to act when others can’t. In 2009, in 2020, and in late 2022, the people who had cash available bought houses, businesses, and equities at prices the fully invested couldn’t touch without selling at a loss. Optionality is invisible until you exercise it, which is why advisors don’t price it. Their incentive is assets under management; cash isn’t billable. Mine is total outcomes, and on that scorecard, the times cash earned its keep more than offset the years it earned 1 percent while inflation ran 3.
Sequence-of-returns risk is brutal during drawdowns
Anyone retiring or job-hunting during a market crash learns quickly that withdrawing from a portfolio down 30 percent locks in the loss permanently. A larger cash buffer lets you avoid selling during the worst windows. Academic research on safe withdrawal rates — including work by Wade Pfau and Michael Kitces — has consistently shown that a “bond tent” or expanded cash position around the early years of retirement materially improves outcomes. The same principle applies to anyone whose income could pause: founders, freelancers, sales-comp employees, anyone in cyclical industries. A few extra months of cash is a hedge against being forced to sell exactly when you shouldn’t.
Behavioral steadiness compounds quietly
Cash isn’t just a financial asset; it’s a psychological one. Investors with adequate buffers panic less, sell less during crashes, and stay invested through the recoveries that produce most of long-term equity returns. Investors who are fully invested with no buffer routinely sell at lows because they need the money or because anxiety overwhelms strategy. Vanguard’s research on “advisor alpha” attributes a substantial portion of long-run investor outperformance not to picks but to behavioral coaching. A cash cushion is self-administered behavioral coaching. It pays for itself in the trades you don’t make.
The bottom line
The standard advice — three to six months of expenses, then maximize invested capital — is correct on average for an idealized investor. Real life has irregular cash flows, surprise opportunities, and emotional bandwidth limits. Holding 9, 12, or even 18 months of cash isn’t financial illiteracy; it’s a tradeoff with real benefits the spreadsheet doesn’t capture. If your advisor can’t explain why your particular situation might justify more cash than the textbook, that’s not your problem. It’s theirs.
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