For international markets, the Financial Times Stock Exchange 100 (FTSE 100) Index and the Nikkei 225 Index are popular proxies for the British and Japanese stock markets, respectively.

The stock and bond markets are closed for Good Friday, but will reopen on Monday, following the Easter holiday.

That may seem like a minor difference, but over time, Vanguard S&P 500 ETF is going to track the index more closely, and that ...