Why Brokerage Returns Can Be Misleading

Most brokerage apps display time-weighted returns (TWR). TWR isolates investment performance from your deposit timing — useful for evaluating a fund manager, but wrong for understanding your personal outcome.

If you deposited a large sum right before a downturn, your actual loss was much worse than the TWR suggests. The brokerage's TWR treats all periods equally regardless of how much money was actually at work during each one.

Brokerages often show "since account opening" returns. If you opened your account during a bull market, this number reflects mostly favorable conditions. It doesn't isolate what your recent contributions earned, and it doesn't tell you how you compare against simply buying a low-cost index fund on each of your deposit dates.

A long account history with early strong gains can mask years of underperformance that would be obvious if you looked at the most recent 5-year window.

Expense ratios are deducted daily from a fund's net asset value — they never appear as explicit charges in your statements. A mutual fund with a 1% expense ratio versus one with 0.05% costs you tens of thousands of dollars over a 30-year horizon, but the brokerage return figure quietly includes this drag without ever naming it.

The Expense Ratio Impact calculator shows the exact long-term dollar cost of your fund's fee structure.

A brokerage return of 8% in a year with 5% inflation is only 2.9% in real purchasing power. No brokerage dashboard shows this. Your nominal gain and your real gain are entirely different numbers for financial planning and retirement readiness.

Over a 20-year period with average 3% inflation, a portfolio with 7% nominal returns has only grown ~3.9% per year in real terms — and most investors don't realize how much inflation silently erodes their progress.

Get your actual money-weighted return (XIRR) from your real cash flows using XIRR Auditor. Subtract inflation with the Real Return Calculator. Compare to the period-matched benchmark return using the Benchmark Return tool.

With these three numbers together, you will know not just what the market did, but what your money did — and whether your decisions over the years helped or hurt your actual outcome.