S.Korean stocks rise on tech boost, foreign buying

* KOSPI rises, foreigners net buyers * Korean won weakens against U.S. dollar * South Korea benchmark bond yield falls SEOUL, April 13 (Reuters) - Round-up of South Korean financial markets: ** South Korean shares rose on Tuesday, boosted by tech heavyweights and buying by foreigners, although some investors were cautious ahead of U.S. corporate earnings and inflation data. Both the won and the benchmark bond yield fell. ** The benchmark KOSPI rose 25.70 points, or 0.82%, to 3,161.29 by 0210 GMT. ** Chip giants Samsung Electronics and SK Hynix rose 0.96% and 1.09%, respectively. Battery makers LG Chem and Samsung SDI also jumped 3.18% and 5.19% each. ** Foreigners were net buyers of 182.8 billion won ($162.37 million) worth of shares on the main board. ** The Bank of Korea is widely expected to keep interest rates at all-time lows on Thursday, as signs of a solid economic recovery are offset by concerns over a recent spike in domestic COVID-19 cases and a slow rollout of vaccines. ** T