new york indian stocks trading on american bourses collectively witnessed a value erosion of 5 billion last week with it bellwether infosys technologies accounting for nearly half of the total lossesfor the week ended july 16 the 16 indian entities listed on the new york stock exchange and nasdaq together lost 504 billion from their market capitalisation mcap with the software major infosys shedding 24 billion from its valuation to 33 billionamong the 16 companies listed as american depository receipts adrs 3 of them including auto giant tata motors telecom major tata communications ltd tcl and internet firm sify technologies saw a gain in their respective mcapinfosys is followed by another it firm wipro technologies whose valuation plunged by 15 billion to a total of 3038 billionprivate sector lender hdfc banks valuation fell by 714 million to 218 billion while that of copper producer sterlite industries declined by 1763 million to 28 billionmeanwhile tata motors emerged as the biggest gainer which saw its market capitalisation rising by 188 million to a total of 190 millionon the other hand valuation of icici bank decreased by 129 million to 21 billionit firm mahindra satyam earlier known as satyam computer services saw a value erosion of 60 million to 34 billion followed by the outsourcing firms genpact and wns holdings which lost 55 million and 27 million from their valuations respectivelyin addition valuations of other adrs pharma major dr reddys it firm patni computer systems bpo company exl service holdings mahanagar telephone nigam ltd and internet firm reddifcom valuations slipped in the range of 4 million to 24 millionon friday the us markets ended in the red with dow jones industrial average settling down by 26141 points at 1009790 and sp 500 fell by 3160 points at 106488 besides tech heavy nasdaq was down 7003 points at 217905