LONDON : Global shares and the U.S. dollar edged up on Wednesday as investors made last-minute adjustments to portfolios in the countdown to the year's final flurry of central bank meetings, while news of a potential Nissan-Honda tie-up lifted car stocks. The dollar traded at multi-month, and even multi-year, highs against a range of currencies, including the Australian, New Zealand and Canadian dollars, ahead of the U.S. Federal Reserve's decision on interest rates later in the day. The Fed is

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