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South Korea's business sentiment rose to a more than four-year high in October, driven by solid confidence in manufacturing and an improved outlook in nonmanufacturing, a central bank survey showed. The Composite Business Sentiment Index climbed as the strong performance of key industries, including semiconductors, spread to downstream sectors, according to the Bank of Korea survey reported by Yonhap and Korea Times. Separately, Lotte Shopping's Hanoi megamall, Lotte Mall West Lake Hanoi, reached 1 trillion won ($720 million) in cumulative sales, setting a record for an overseas shopping complex three years after its launch, Korea Times reports. Korean investors shrugged off a US tech rout, with the KOSPI rising more than 2 percent Monday on institutional buying, the Korea Times adds.