’Tis the season for companies to lay off workers and buy back shares By: MarketWatch October 23, 2015 at 05:00 AM EDT Dow Chemical, 3M and other companies ought to spend money on boosting sales instead of share repurchases, says Phil van Doorn. Read More >> Related Stocks: 3M Co Biogen Idec Caterpillar Dow Chemical International Business Machines Macy's Mylan Olin Corp Perrigo