With U.S. stock futures trading lower this morning on Tuesday, some of the stocks that may grab investor focus today are as follows:Wall Street expects Duluth Holdings Inc. (NASDAQ:DLTH) to report a quarterly loss of 46 cents per share on revenue of $118.50 million before the opening bell, according to data from Benzinga Pro. Duluth shares gained 5.4$3.30 in after-hours trading.B Riley Financial Inc. (NASDAQ:RILY) reported earnings of $4.50 per share for the second quarter, versus a year-ago loss of$1 ...