 Shares of Rockwell Automation Inc. ROK, -1.04 sank 4.4 in premarket trading Tuesday toward a 15-month low, after the industrial automation and information services company missed fiscal second-quarter profit and sales expectations and cut its full-year outlook, citing significant supply chain volatility and inflation. Net income dropped to 53.9 million, or 46 cents a share, from 415.0 million, or 3.54 a share, in the year-ago period. 