The KOSPI fell more than 3 percent Monday as weakness in Samsung Electronics and SK hynix weighed on the broader market, reversing gains posted over the previous two sessions on expectations that the two semiconductor heavyweights would boost shareholder returns. The benchmark index opened 31.88 points, or 0.46 percent, lower at 6,881.07 before extending its losses to close at 6,696.96, down 215.99 points, or 3.12 percent. Foreign investors led the selling, offloading a net 3.69 trillion won ($2.67 billion) worth of KOSPI shares, while institutional investors sold 1.29 trillion won. Retail investors bucked the trend with net purchases of 3.32 trillion won, cushioning the market’s losses. Samsung Electronics and SK hynix shares dropped 8.70 percent and 3.41 percent, respectively, with the disparity in their losses largely attributed to differences in the shareholder return measures announced last week. Last Wednesday, SK hynix unveiled plans to repurchase 40 trillion won worth of its own shares and retire them in full, while pledging to return at least 50 percent of its free cash flow o