SINGAPORE (BLOOMBERG) - Sea Ltd expects e-commerce revenue to double in 2021, sustaining its torrid pace of growth as South-east Asia's most valuable company counts on regional online shopping demand to persist after the pandemic. Revenue rose to US$1.6 billion (S$2.12 billion) in the last three months of 2020 from US$777.2 million a year earlier, Singapore-based Sea said on Tuesday (March 2) in a statement. Net loss widened to US$523.6 million from US$283.8 million, as fourth-quarter sales and marketing expenses climbed 95 per cent to US$665.2 million, led by digital financial services. Sea, backed by Tencent Holdings, has emerged as a stock-market sensation since its initial public offering in New York in 2017, as investors bet the company can establish itself as a leader in e-commerce and gaming in South-east Asia. Among companies valued at US$100 billion or more, the stock is the No. 1 performer in Asia since the start of last year and only trails Tesla globally. It's also trying to establish fintech as a third growth driver. Sea said on Tuesday it's acquired 100 per cent of Composite Capital Management, a Hong Kong-licensed global investment management firm. With the acquisiti...