...+ Standard & Poor's Ratings Services expects DuPont's earnings to be weaker than previously anticipated following sustained challenges in the company's operating environment. + As a result, we believe credit will deteriorate to levels inconsistent with current ratings. + We are lowering our ratings, including our corporate credit rating to 'A-' from 'A', by one notch. + The negative outlook continues to reflect our view that earnings and credit measures may be further pressured, and the ongoing risk that the company could consider a split in its business. NEW YORK (Standard & Poor's) Oct. 7, 2015--Standard & Poor's Ratings Services today lowered its ratings, including its corporate credit rating, on E.I. DuPont De Nemours & Co. to 'A-' from 'A'. The rating outlook is negative. We also lowered our short-term rating on the company to 'A-2' from 'A-1', our senior unsecured ratings to 'A-' from 'A', and our ratings on preferred capital to '###' from '###+'. "The downgrade reflects our view...