 Shares of Accenture PLC ACN, -1.78 dropped 0.9 toward an 18-month low in premarket trading Thursday, after the consulting company reported fiscal fourth-quarter profit and revenue that topped expectations but provided a downbeat outlook. Net income for the quarter to Aug. 31 rose to 1.67 billion, or 2.60 a share, from 1.42 billion, or 2.20 a share, in the year-ago period. 