US economy is in great shape, but very fragile. Martin Feldstein, January 19, 2018, Video, “In a sea of bulls, one bear has emerged: Harvard University professor Martin Feldstein said on Friday that rising interest rates could send stocks into a downward spiral.  In March, the Federal Reserve is expected to announce its policy rate hike outlook for 2018. In September, Fed officials predicted it would raise rates three times in 2018 and twice more in 2019.” Link