Small businesses are waving a caution flag

"After a banner year, many small businesses are becoming more cautious about their investment and hiring plans," The Wall Street Journal's Ruth Simon reports.

By the numbers: "Economic confidence among small firms, which edged downward for much of 2018, in January reached its lowest level since President Trump’s election, according to a monthly survey of 765 small firms for The Wall Street Journal by Vistage Worldwide. ... Just 14% of firms expect the economy to improve this year, while 36% expect it to get worse."