New York — US regulators on Thursday killed the politically sensitive sale of the Chicago Stock Exchange (CHX) to a group led by China-based investors, saying a lack of information on the would-be buyers threatened the ability to properly monitor the exchange after the deal. The move by the Securities and Exchange Commission (SEC) ends a two-year battle to gain approval for the sale and underscores the more hostile environment facing Chinese buyers under the administration of US President Donald Trump. Trump brought the exchange deal up twice during the election campaign as an example of how jobs and wealth were leaving the US. SEC staff initially approved the sale of the privately owned exchange in August, but within minutes of the announcement SEC commissioners, led by chairman Jay Clayton, a Trump appointee, put the decision on hold for further review. US legislators from both parties had harshly criticised the deal in joint letters to the SEC, arguing that it would give the Chin...

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