Buy-now-pay-later firms were among the biggest losers, with index heavyweight Afterpay APT.AX sinking about 9.5% to a seven-month low. By Savyata Mishra May 11 (Reuters) - Tech stocks dragged Australian shares lower on Tuesday, in line with broader Asian markets, as investors worried that rising commodity prices could stoke inflation and lead to a sooner-than-expected interest rate hike by the U.S. Federal Reserve. Investors now await the country's federal budget due later in the day that is expected to embrace billions in new spending to secure a recovery from the pandemic.