Ready to invest in African e-commerce? This stock could be your best bet.Jumia Technologies (JMIA 31.32%) is hardly a household name in the United States, but a lot of investors are getting familiar with the rising African e-commerce star on Tuesday, after a Benchmark analyst initiated coverage of Jumia with a "buy" rating and a $14 price target.Valued at just$8 and change before today's rating, Jumia shares soared in afternoon trading, passing $11 a share by 1:45 p.m. ET -- a 30% gain. Introducing Jumia T ...