UNDATED (AP)- Americans on the cusp of retiring are facing a tough choice as they watch their nest eggs shrink: Stay the course or keep working. A stock market slump this year (2022) has taken a big bite out of investors’ portfolios, including retirement plans like 401(k)s. The S&P 500, the benchmark for many index funds, is down about 17% since its all-time high in early January. The sharp reversal after a banner 2021 for Wall Street has been particularly unsettling for those who have been planning to retire sooner, rather than later, and banking on a healthier stock portfolio to help fund their post-work lifestyle.