shares of robert half international inc rhi slumped 018 to 7300 friday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 083 to 416948 and the dow jones industrial average djia rising 080 to 3409816 robert half international inc closed 2934 short of its 52week high 10234 which the company reached on april 29th