LONDON, March 26 Reuters Global shares edged up on Tuesday, partially shrugging off mixed messages from U.S. policymakers and a wobble in the Chinese yuan that unsettled investors ahead of Friday39;s U.S. inflation data.

The risk of Japan intervening to prevent further falls in the yen squeezed the dollar. However, it rose against the yuan on speculation that China may tolerate a weaker currency.

The MSCI AllWorld index increased 0.1 on the day, aided by a 0.2 rise in Europe39;s STOXX 600, while SP 500 futures climbed 0.4.

In the spotlight was the yen , which has been trading close to its weakest against the dollar since 1990, even after the Bank of Japan raised interest rates last week for the first time in 17 years.

The 14 decline in the yen39;s value over the last 12 months fed a surge in Tokyo39;s Nikkei index to record highs this month, but stirred concern among Japanese officials that the recent depreciation is problematic.

FX was the wallflower for most of Q1, when we had record highs for stocks, XTB research director Kathleen Brooks said.

We39;ve got changing sands in the FX market. Youve got threat of intervention from Japan … and from China. Its good to see that they do actually care about the economy and they are wiling to step in. Its not quite the stimulus we want, but they are saying 39;enough is enough now, we do need to worry about our deflation39;, she said.

The yen strengthened a touch on Tuesday, leaving the dollar down 0.1 at 151.35….