Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

P/E (or similar) for index funds?
The S&P 500 is a market index.  The P/E data you're finding for the S&P 500 is data based on the constituent list of that market index and isn't necessarily the P/E ratio of a given fund, even one that aims to track the performance of the S&P 500.    I'm sure similar metrics exist for other market indexes, but unless Vanguard is publishing it's specific holdings in it's target date funds there's no market index to look at.