The Vanguard Group, one of the world’s largest asset manager, on Friday invested at least Rs 2,660 crore in the domestic markets through its fund Vanguard Emerging Market Stock Index. The index fund provider picked up shares of at least 26 companies, which included Tata Chemicals, Honeywell Auto and IIFL Finance. Market players said the buying could have been triggered by the FTSE rebalancing. The global index provider semi-annual index rebalancing took effect on Friday.