How to track performance of different sectors and market segments?

Currently, we provide data on a sectors' performance based on various ETFs that imitate a particular sector:
Ex. Sector ETFs - This section classifies the various sectors within the US market and provides a reference ETF for that sector. The ETFs performance is indicative of the sector's performance
https://seekingalpha.com/etfs-and-funds/etf-tables/sectors
 

Other Market segments include 

  • Country ETFs
  • Bond ETFs
  • Commodity ETFs
  • Market Cap ETFs 
    Etc.

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