The Tel Aviv Stock Exchange, the first market to open worldwideafter Standard and Poor downgraded America's credit rating opened to major losses Sunday. Upon opening, the TA-25 fell 5 percent to 1,100 points; theTA-100 plunged 5.2 percent; the TA-Banking Index dropped 5.3 percent; and theTA Real-Estate 15 fell 6.4 percent. The plunge prompted a series of brief suspensions in trading. The losses come as the international markets were left reelingby the announcement Friday that Standard & Poor's had downgraded the U.S.credit rating for the first time in history from AAA to AA+.