After a volatile stretch, South Korea's stock market is bracing for two major chipmaker events that could determine its near-term direction: Samsung Electronics' preliminary second-quarter earnings and SK hynix's American depositary receipts listing in the US. Samsung Electronics is widely expected to post record-high earnings on Tuesday, buoyed by the artificial intelligence-driven chip boom. The market consensus calls for revenue of about 170 trillion won ($111 billion) and operating profit of