Ford Motor Co. said it's investing $4.5 billion in electrified vehicles, responding to regulatory pressure with a bet on technologies that have struggled to attract buyers in the U.S. as fuel prices stay low.<br />The automaker will add 13 electric cars and hybrids by 2020, rising to 40 percent of its lineup from 13 percent now, Chief Executive Officer Mark Fields said Thursday at a press conference in Dearborn, Michigan.<br />The plans include a new Focus Electric car with fast-charge capability, Ford said.<br />"We're going to see more and more companies invest in electrified vehicles because at the moment there's some very stringent 2025 emission standards," said Michelle Krebs, senior analyst at AutoTrader.com.