U.S. stock funds returned to the plus column, gaining 3.16% in the week ended Jan. 22. That cut their year-to-date loss to 0.35%. U.S. stock funds were driven by stock market news about the European Central Bank’s stimulus efforts, seeking to boost the eurozone economy. European region funds rose 2.55% in the week. Vanguard FTSE Europe ETF (VGK) gained ground five straight days.