FOREX-Dollar sits tight near six-month high ahead of Fed meeting, data

* Dollar index holds near six-month peak, euro eight-month trough * Euro zone inflation and China PMI also in focus (Updates prices, adds comments) The Fed is sure to cut its monthly bond-buying programme by another $10 billion as it looks to wind up the scheme later in the year, but the focus for markets is on any clues to the timing of the first interest rate hike.