Is there a bond or Index Fund for real estate?

[Matthew Koch]

if people individually are trading on the stock market and they can lose money or gain money and then there's people that are investing in an index fund which covers an entire area of a stock market essentially putting their money in America so if America does well we do well investing in that stock index fund so why isn't there an infrastructure in place for a bond or an index fund for Real Estate Investors as big as this company or idea is growing for investing in real estate then how could it be set up where it is an index fund or a bond other people can benefit from that?