President Donald Trump's tariffs, while initially providing a boost to the dollar, will ultimately weigh on it, according to Bank of America. "The dollar may not like tariffs after all," Athanasios Vamvakidis, head of G-10 foreign exchange strategy at the bank, said in a report on Wednesday. "If the US imposes tariffs on the rest of the world and is met with full-scale retaliation, the dollar could weaken."