HONG KONG, Aug 6 (Reuters) - Asian shares lost ground on Friday despite gains on Wall Street, as the spread of the Delta variant of the coronavirus across the region heightened worries about its economic recovery. Uncertainty about Chinese policy has also left investors in Asia nervous, though this week regional indices clawed back some of last week"s losses caused by Beijing"s crackdowns on the technology and education sectors. MSCI"s broadest index of Asia-Pacific shares outside Japan (.MIAPJ0000PUS) lost 0.25% on Friday, dragged down by Chinese blue chips (.CSI300), which fell 0.87% and Korea (.KS200) down 0.35%. Japan"s Nikkei (.N225) rose 0.26%. "There are two main drivers of volatility in the market this week, firstly everything surrounding the Chinese regulatory drive...and secondly the severity of Delta outbreaks around the region," said Carlos Casanova, senior economist Asia at UBP. "International investors are still wrapping their head around what happened in the education sector (in China). I expect that will continue to drive sentiment. The regulatory drive is not over yet, it should continue to be a factor in the next three to six months or so," he said. China on Friday reported 124 confirmed cases for Aug. 5, its highest daily count for new coronavirus cases in the current outbreak, fuelled by a surge in locally transmitted infections. Authorities have imposed travel restrictions in some cities. read more Thailand and Malaysia both reported record daily cases on Thursday. read more "The Delta variants exposed the vulnerability of Asian economies as the overall vaccination rate is low in Asia," wrote analysts at Bank of America in a note. This is weighing on shares in Asia and while the MSCI Asian benchmark is up 1.6% this week, it is still down just over 10% from all time highs hit in February. In contrast, the MSCI world shares index (.MIWD00000PUS) is just shy of a record high, which it hit on Wednesday. Elsewhere in the region, PT Bukalapak.com Tbk (BUKA.JK), an Indonesian e-commerce company backed by Ant Group and Singapore sovereign fund GIC [RIC:RIC:GIC.UL], rose nearly 25% on its market debut after raising $1.5 billion in the country"s biggest initial public offering. read more U.S. stock futures, the S&P 500 e-minis , were down 0.05%, while Euro Stoxx 50 futures were down 0.08% and FTSE futures were down 0.04%. The Nasdaq and S&P 500 closed at record levels on Thursday after a spate of strong corporate earnings and a further decline in U.S. unemployment claims. Eyes are now on the jobs report for July due in the U.S. session. Treasury yields extended their gains in Asian hours, having earlier been helped by the healthy jobless claims report. Benchmark 10-year Treasury note yields rose to 1.2366% approaching a week high, compared with its U.S. close of 1.217% on Thursday. This had a knock-on effect for the dollar, which rose against the yen to a week high. The stronger dollar and potential for higher yields hurt gold. The spot price fell 0.23% to $1,799.6. Oil paused for breath in Asian trading on Friday, but US crude was set for its biggest weekly loss since October after falls earlier in the week due to rising COVID-19 cases and a surprise build in U.S. crude stockpiles. U.S. crude was $69.2 a barrel, up 0.16%. Brent crude was $71.39 per barrel, up 0.22%. Ether , the world"s second largest cryptocurrency dropped 2% a day after a major software upgrade to its underlying ethereum blockchain, which is expected to stabilise transaction fees and reduce supply of the token. read more