HONG KONG, Oct 18 (Reuters) - Mainland Chinese and Hong Kong equity markets fell on Monday after data showed China"s economy grew more slowly than expected in the third quarter, weighing on regional stocks, athough losses were capped by hopes of support from policymakers. Oil prices, meanwhile, hit new multi-year peaks, continuing their recent surge amid a global energy shortage, with U.S. crude at a fresh seven-year high and Brent at a three-year high. China"s gross domestic product (GDP) grew 4.9% in July-September from a year earlier, the weakest pace since the third quarter of 2020, as China grappled with power shortages, supply bottlenecks and sporadic COVID-19 outbreaks as well as rising jitters over the property sector. read more Chinese blue chips (.CSI300) were down 1.53% and the Hong Kong benchmark (.HSI) lost 0.56%, although most of the falls came right after the bell, prior to the release of the data. "In response to the ugly growth numbers we expect in the coming months, we think policymakers will take more steps to shore up growth," said Louis Kuijs, head of Asia economics, Oxford Economics. "We think the electricity shortages and production cuts will become less of a problem later in Q4. In line with our expectation, senior policymakers have started to stress growth and we expect them to start calling for the pursuit of climate targets on a more measured timeline." The weaker-than expected data weighed on regional benchmarks. MSCI"s broadest index of Asia-Pacific shares outside Japan (.MIAPJ0000PUS) was last down 0.2%, while Japan"s Nikkei (.N225) lost 0.3%. U.S. stock futures, the S&P 500 e-minis , were steady. The Asian declines come after stocks globally (.MIWD00000PUS) finished last week in a bullish mood posting their best day in five months on Friday as strong U.S. corporate earnings reports fuelled optimism about the economy, although firm oil prices kept inflation risks alive and lifted government bond yields. Investors, meanwhile, continue to fret over inflation, driven by a reopening from COVID-19 and supply chain issues, said Shane Oliver, chief economist at AMP, pointing as an example to New Zealand, which on Monday reported a 2.2% rise in its consumer price index in the third quarter, the fastest pace in over a decade. read more "But in the last two weeks share markets have been shrugging off most things" he added. Analysts at CBA said as inflation pressure builds, they expect U.S. rates to rise, supporting the U.S. dollar which "has further upside on our view". The yield on benchmark 10-year Treasury notes rose as high as 1.5930% on Monday, heading back towards the four-month high of 1.6310% hit early Tuesday, before a wobble later in the week. The pound could gain on the dollar this week as "UK economic and inflation dynamics support the upward shift to the UK interest rates", the CBA analysts added. In early trading on Monday, most currencies were quiet. The greenback was little changed against a basket its peers at 93.992, off its one-year high of 94.563 hit last Monday, while the yen hovered near its almost three-year low against the dollar. U.S. crude was last up 1.28% at $83.33 a barrel, while Brent crude was last 0.85% higher at $85.58 per barrel. Gold was last up 0.14% at $1,769.60 an ounce, after falling 1.5% on Friday on higher U.S. bond yields and a rise in U.S. retail sales. Bitcoin was within sight of its all-time high, sitting at $62,000 and not far from April"s record of $64,895, having gained last week on hopes that U.S. regulators would allow a futures-based exchange-traded fund. read more