Rate-sensitive megacap growth and technology stocks, that have led the Wall Street rally, such as Nvidia NVDA.O, Apple AAPL.O and Tesla TSLA.O, were down between 1.7% and 5.0%. By Echo Wang and Bansari Mayur Kamdar Aug 9 (Reuters) - Wall Street's main indexes fell on Wednesday, a day after a report saying Americans borrowed more than ever on their credit cards in the last quarter and as investors awaited inflation data due later this week. On Tuesday, Wall Street's main indexes ended lower in a broad selloff after credit rating agency Moody's downgraded several small and mid-sized banks.