S&P cut the long-term U.S. credit rating by one notch to AA-plus. The credit agency said late Friday that it was making the move because the deficit reduction plan passed by Congress on Tuesday did not go far enough to stabilize the country's debt situation. U.S. Treasuries, once undisputedly seen as the safest investment in the world, are now rated lower than bonds issued by countries such as the United Kingdom, Germany, France or Canada. The outlook on the new U.S. credit rating is negative, S&P said in a statement, a sign that another downgrade is possible in the next...