Shares of Caterpillar Inc. CAT, -3.93% lost 2.0% in premarket trading Tuesday, after the construction and mining equipment maker reported second-quarter profit that beat expectations but sales that came up a bit shy, as higher pricing and sales volume was partially offset by unfavorable currency impacts. Net income rose to $1.67 billion, or $3.15 a share, from $1.41 billion, or $2.56 a share, in the year-ago period. Excluding nonrecurring items, adjusted earnings per share of $3.18 beat the FactSet consensus of $3.01. Sales grew 10.5% to $14.25 billion, below the FactSet consensus of $14.28 billion, as energy and transportation and resource industries businesses beat expectations while construction industries missed. Operating costs increased more than sales, rising 10.8% to $12.30 billion and as operating profit margin contracted to 13.6% from 13.9%. Caterpillar’s stock has declined 8.1% over the past three months through Monday while the Dow Jones Industrial Average DJIA, -0.79% has slipped 0.8%.