The S&P 500 fell 2.99 points, or 0.23%, to close at 1,310.33. The index finished May down 6.3%.
Shares of Joy Global dropped 5.12% to $55.86 after the mining equipment maker lowered its fiscal-year outlook, saying U.S. aftermarket order softness could hurt earnings by about 18 cents a share for the year.
Shares of Milwaukee-based company hit a 52-week low on Thursday of $53.26. The stock's 52-week high of $101.44 was set on July 21.Fourteen of the 18 analysts who cover Joy Global rate it at buy; four analysts give the stock a hold rating. The stock has fallen 37.69% year to date.