Among megacap growth stocks, Amazon AMZN.Ofell 0.3%, while Tesla TSLA.Orose 0.4%. By Anisha Sircar June 14 (Reuters) - U.S. stocks extended losses on Tuesday, after a bruising selloff a day earlier pushed the S&P 500 to confirm a bear market, as investors braced for an aggressive interest rate hike from the Federal Reserve this week. The U.S. central bank is expected to raise interest rates by 75 basis points on Wednesday after last week's consumer price inflation data came in much hotter than anticipated.