GLOBAL MARKETS-Stocks, euro fall as German data, U.S. earnings disappoint

* Euro dips, European shares subdued after downbeat German Ifo survey * Wall Street lower in early trading * Amazon.com, Visa down after disappointing results * Russian shares, rouble, bonds fall; central bank surprises with rate hike (Updates with U.S. market opening, changes dateline; previous LONDON) By Caroline Valetkevitch NEW YORK, July 25 (Reuters) - Weak German economic data and some earnings disappointments pressured world stock markets on Friday and left the euro