GLOBAL MARKETS-Bonds rally on weak U.S. data; Wall St ends lower

* Geopolitical concerns spark late-day equity decline * Italian stocks, bonds fall on Berlusconi threat * Weak U.S. goods data tempers September Fed tapering view * Currency markets subdued, dollar finds support after dip By Ryan Vlastelica NEW YORK, Aug 26 (Reuters) - U.S. Treasury bonds rallied on Monday after July durable goods orders came in weaker than expected, while Wall Street dipped on concerns over Syria. Global equity markets, including U.S. stocks, had been