Activity in Japan’s services sector expanded at the fastest pace in almost two years in August, a survey showed on Thursday, as companies turned more optimistic on business conditions in a sign the economy may be bouncing back. The Markit/Nikkei Japan Services Purchasing Managers Index (PMI) rose to a seasonally adjusted 53.7 from 51.2 in July to reach the highest since October 2013. The reading on the services sector could ease concern about the economy after disappointing industrial production and household spending data for July.