Investors remained in a record-setting mood Thursday.
The Standard & Poor's 500 index closed at an all-time high for the second time in two days and notched its fifth gain in five days.
The Dow Jones industrial average and Nasdaq composite ended mixed after drifting between small gains and losses for much of the day.
The three key stock indexes all opened higher, holding on to tiny gains in premarket trading as investors sized up the latest data on unemployment aid applications and an index of economic indicators.
The Labor Department reported that applications for unemployment benefits fell last week to 312,000, the lowest in more than six years. The...