(Bloomberg) -- It was a moment of triumph for South Korea’s retail investors, when a jump in Ecopro Co. to a record high showcased the influence that they wield over the stock market. But the surge was gone in less than 60 minutes.Most Read from BloombergAsia’s Richest Families Fuel Race for Lucrative Finance JobsUS, Europe Are Growing Alarmed by China’s Rush Into Legacy ChipsLots of US Homeowners Want to Move. They Just Have Nowhere to GoA 5% US Mortgage Rate Is Seen as Tipping Point to Unlock