Australia shares set to fall for first time in four sessions

SYDNEY, Sept 21 (Reuters) - Australian shares are set to open lower on Monday, following the lead of Wall Street, which fell on the U.S. Federal Reserve's decision to keep on hold interest rates - stoking concerns over weak global economic growth. Local share price index futures fell 1.5 percent to 5,072.00, a 97.5 point discount to the close of the underlying S&P/ASX200 index on Friday. The benchmark rose 0.5 percent in the last session. New Zealand's benchmark NZX 50 index rose 0.68 pe