The US also revoked its special preferences for a list of World Trade Organization members, including Brazil, India, Indonesia and South Africa.
The US deal involves 66 F-16V fighter jets, and would be the first such sale to Taiwan since 1992 if approved by the US Congress.
The UN chief explained that only looking at the organization's overall finances can be misleading, since it has more assets than liabilities but not enough liquid assets.
The United States is still seen as the No 1 market with great potential for Chinese companies to expand business despite trade disputes with China and its investment controls, said the report, entitled New Perceptions of China Going Global.
The United States severed diplomatic ties with Taiwan in 1979 and established such ties with the People's Republic of China. The joint communique on the establishment of China-US diplomatic ties shows the US should maintain only unofficial relations with Taiwan.
The US three-year treasury note yield surpassed its five-year note on Monday. The inverted yield curve caught investors' attention because historical statistics showed that when short-term yields trade above longer-term rates a recession could follow.
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The US top aircraft manufacturer announced the signing of the document with the IAG, owner of British Airways, at the ongoing Paris Air Show, and the purchase will also include the larger 737 Max 10 jets.
The US imported 2 billion in autos last year, 1 billion more than it exported, a deficit that has risen 29 percent since 2013, according to Commerce Department figures.
The US-China relationship is the most important bilateral tie in the world today. People in both countries are benefiting from the deepening economic integration, Locke told the C100 audience.
The United States, together with Britain and France, launched missile strikes on Syria on Saturday, saying that it was in response to an alleged chemical weapon attack by the Syrian military. The Syrian government has categorically denied the accusation.