By the time you reach your 40s, plenty of people may feel they’re on solid financial footing. But financial planners say this decade is where one of the most damaging investing mistakes almost everyone makes shows up. Competing priorities create the illusion that saving can wait while poor habits can undermine financial futures. Experts explained the biggest investing misstep people make in their 40s (and a few others) and how to course-correct before they cost you a comfortable retirement. The Biggest ...