2. Martin Midstream Partners ( MMLP) transports and stores petroleum products in the Gulf Coast region. Second-quarter profit tumbled 71% to $3.1 million, or 10 cents a share, as revenue climbed 52% to $212 million. The operating margin declined from 7.8% to 4.3%. Martin Midstream's stock trades at a book value multiple of 2 and a sales multiple of 0.7 -- 51% and 59% discounts to peer averages. It's costly based on trailing and forward earnings. One researcher rates the stock "buy" and three rank it "hold." A median target of $34 implies 9% upside.