Indicative Net Asset Value, or iNAV, is a measure of the intraday net asset value, or NAV, of an investment. Indicative net asset value is reported approximately every 15 seconds by a calculation agent, typically the exchange that the investment is trading on.Why does this matter? Because when you're making decisions about where to invest your hard-earned money, you want to know what kind of return you can expect. And knowing the iNAV can give you a pretty good idea.So what exactly is iNAV? It's simply a way to express NAV in real-time terms. The formula for calculating it is: (current market price + accrued dividends) / (number of shares outstanding). So if an investment has an iNAV of $10 and there are 100 shares outstanding, each share would be worth $10 at that particular moment in time.