GM SEPT 20,7.30AM;S AND P DOWN GRADES ITALY,S CREDIT RATING..EURO SLIDES DOWN.. CRUDE$85.70 TRADES FLAT/GOLD$1782LTP 27665 SUPP 27550 RES 27950/SILVER$39.52 LTP 63293 SUPP 62800 RES 63800-64000/COPPER OPENS MARGINALLY UP ARD 0.20%LTP 404.70 SUPP 402 RES 407.70/NICKEL LTP 1013 RES 1026 SUPP 1003/US DOLLAR INDEX 77.24 TRADES POSITIVE/