By Tom Westbrook SINGAPORE (Reuters) – Asia’s stock markets edged lower on Tuesday, the yen hit a 20-year low and bond markets wavered as investors nervously awaited U.S. inflation figures and central bank meetings in Australia, Europe and, next week, in the United States. British Prime Minister Boris Johnson survived a no-confidence vote among his Conservative Party’s lawmakers on Monday, but gilts and Treasuries nursed losses from selling that began as talk of a move to replace him gathered steam through London and New York trade. The 10-year Treasury yield rose 9.9 basis points (bps) overni…

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