Mumbai, Jan. 30 -- Asian stocks ended mostly lower on Friday as Apple warned of rising memory chip prices and China's state-owned Securities Times warned against speculative trading.

Tariff worries returned to the fore after U.S. President Donald Trump threatened Canada with a 50 percent tariff on all aircraft sold in the United States and also signed an executive order that would impose a tariff on any goods from countries that sell or provide oil to Cuba, a step that raises fresh pressure on Mexico.

The dollar traded higher, clawing back some of its slide on the week, as U.S. lawmakers reached an agreement to avoid a partial government shutdown and President Trump said he has chosen a very good person to be the new Federal Reserve cha...