LONDON—The dollar hit a six-day high in early trading on Tuesday following a jump in U.S. Treasury yields, while the yen steadied after the Bank of Japan saying it would stick to its ultra-loose monetary policy caused the currency to slip versus the dollar. The U.S. Federal Reserve meets next week. It is expected to raise rates in March, for the first time since the start of the coronavirus pandemic, and investors are pricing in four rate hikes in all during 2022. As investors prepared for the possibility of the Fed being more hawkish than expected, Treasury yields jumped, with two-year yields—which track short-term rate expectations—crossing 1 percent for the first time since February 2020. The U.S. 10-year yield also hit a two-year high. The dollar strengthened against a basket of currencies, hitting a six-day high of 95.454 during Asian trading. At 1232 GMT it was at 95.385, up 0.2 …