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American, Delta, Southwest and United, the four largest US carriers, spent about billion in the last five years to buy back shares, according to S&P Dow Jones Indices.
Among other setbacks, "countries face a drop in tax revenue, linked to the pandemic, as a result of the contraction in economic activity and lower prices for commodities," the report added.
American and Air Canada said they were closely monitoring the investigation.
Among the top 10, four of them - Pony Ma, Jack Ma, Ding Lei (CEO of Chinese game developer NetEase Inc) and Lei Jun (founder of smartphone maker Xiaoxi) - are from TMT (telecommunications, media and technology) sectors.
Amazon’s support for Pandora is interesting, since the company already has its own music store and streaming service, which was recently updated on iOS to provide users with ad-free radio stations centered around artists and genres.
