July 28 (Reuters) - Small-time traders have been jumping in to buy stocks discarded by big investors during the selloff triggered by China’s regulatory crackdown, research showed on Wednesday. Vanda, an independent research house, said its data showed subdued retail trader activity earlier in the week, but just as fears of contagion from China spilled over to Wall Street, “the dip-buying army” reappeared. Vanda’s data is tracked globally but U.S.-based traders likely comprise the biggest chunk of it. Their buying may help to stabilise U.S.-listed Chinese shares after several days of selling driven by Beijing’s move to tighten regulations on the technology and education sectors. The Nasdaq Golden Dragon China benchmark of tech stocks rebounded 8% on Wednesday after four days of falls. Vanda said U.S.-listed shares of three Chinese companies -- electric vehicle makers Nio and Xpeng, and tech giant Alibaba -- were among the six biggest bought stocks by U.S. retail investors on Tuesday, attracting net inflows worth a combined $194 million. Those shares have fallen between 12% and 17% at their lowest point this week compared with Friday’s close. Overall, stocks impacted by the regulatory crackdown had seen combined retail inflows of $239 million, roughly 14% of total retail purchases on the day, Vanda said. The data could signal that while professional investors had turned wary about China, retail traders had sensed an opportunity. Retail traders have shot to prominence this year after big bets on heavily shorted stocks such as video game retailer GameStop or cinema chain AMC, driving huge rallies in relatively obscure shares and heaped losses on several big-name hedge funds. But the buying of newly cheap Chinese shares implies a shift in the retail traders’ behaviour, Vanda analysts Ben Onatibia and Giacomo Pierantoni noted. “From driving triple-digit returns in high multiple stocks, they have turned into dip buyers in underperforming ones,” they told clients. “Financials, energy and reopening are a few of the sectors where they’ve cushioned institutional selling.” Households are the biggest investors in the United States and own 37% of the equity market, according to data published by Barclays. Research has also shown that U.S. stimulus checks to households have found their way into the equity market. Reddit, popular with day traders for stock tips, contained discussions on the Chinese share slump, with comments from a few interested buyers. But mainstream investors are likely to remain cautious in the face of greater regulatory uncertainty. “The de-rating of tech stocks is here to stay for some time. I don’t expect multiples to go up anytime soon,” said Gael Combes, head of fundamental research equities at Unigestion. Reporting by Danilo Masoni in MILAN; additional reporting by Medha Singh in BENGALURU; Editing by Sujata Rao and Alison Williams Our Standards: The Thomson Reuters Trust Principles.