Mr. Smart, you nailed it on the head. If i remember correctly, this was in one of the introductory chapters for Equity.
My interpretation of this statement basically states that in an efficient market, where all information is known and we’re 100% certain that we will receive x amount of dividends/CF over time, the price today reflects those expecations. Today’s price, or value, is based on expectations of future cash flow and because we have all the relevant information, the appropriate discount rate (required rate of return) would factor in these known expecations.
Taking an application from CF, if you were to buy the stock at today’s price and use the price as an inital cash outflow, then compute the known dividends received overtime as subsquent cash inflows, using the discount rate (based on known information) you should get an NPV of 0. IRR is the rate that would also produce an NPV of 0, thus they would be the same.