that line have weighed on Boeing recently, contributing to a 2 percent drop in the stock's price in January.
Shares of OfficeMax Inc fell 7 percent to $12.09 while Office Depot slid 16.7 percent to $4.18 as the companies announced a $1.2 billion merger agreement. The shares had surged in Tuesday's session after a source said a deal would be announced.
Rival Staples Inc fell 7.2 percent to $13.60 and ranked as one of the S&P 500's biggest decliners.
About 7.49 billion shares changed hands on the New York Stock Exchange, the Nasdaq and NYSE MKT, above the 6.48 billion daily average so far this year.