what are some bond indexes 
while stock market indexes may most often come to mind indexes are also constructed around other asset classes in the bond market for example the bloomberg aggregate bond index tracks the investment grade bond market while the emerging market bond index looks at government bonds of emerging market economies the bottom linemarket indexes provide a broad representation of how markets are performing these indexes serve as benchmarks to gauge the movement and performance of market segments investors also use indexes as a basis for portfolio or passive index investing in the u s such representative indexes include the large cap s p 500 and the technology heavy nasdaq 100 