U.S. stocks closed higher Monday, the first trading day of the month, helped by a decline in the dollar index. Apple extended recent declines for its first eight-day losing streak since the one ended July 28, 1998. ( Tweet This ) The stock lost about 14 percent in April, its worst month since January 2013. The U.S. dollar index lost half a percent for a sixth-straight day of declines, its first since the one ended in early April. Earlier, the index hit its lowest since January 2015, while the euro topped $1.15 to its highest since Aug. 26. "What you've got going on is the dollar has been weak (and) rotation into ... (full story)