Rockwell Automation Corp. said it will add $300 million to its stock buyback program, to lift its target for repurchases to $1.5 billion for fiscal 2018. Earlier, Rockwell said it would make a $1 billion equity investment in PTC Inc. as part of a strategic partnership. "Our decision to increase our share repurchase target for 2018, together with our strategic investment in PTC announced earlier today, reflects our commitment to value-creating capital allocation," said Rockwell Chief Executive Blake Moret. The stock, which was still inactive in premarket trade, has lost 9.3% year to date, while the S&P 500 has gained 3.9%.