For folks who don't know: XIRR looks at a list of "deposit"/"withdrawals" and their dates and tries to calculate the equivalent of a fixed "interest rate" that

For folks who don't know: XIRR looks at a list of "deposit"/"withdrawals" and their dates and tries to calculate the equivalent of a fixed "interest rate" that would supply the same return for the same cash flows. So if you have a portfolio that you added and withdrew money from it calculates a % that a fixed interest savings account would need to deliver the same cash flow. Brokers are typically paid by commission/activity and thus are not incentivized to tell you the cold hard truth. XIRR is honest about how super your stonks are.