** Shares in Brazilian state-run lender Banco do Brasil BMFBOVESPA:BBAS3 fall as final phase of former President Jair Bolsonaro's criminal trial kicks off
** U.S. President Donald Trump slams the case against his ally Bolsonaro as a "witch hunt", imposes 50% tariffs on many Brazilian goods and sanctions Brazilian authorities
** Supreme Court Justice Alexandre de Moraes, who oversees Bolsonaro case, is reportedly a Banco do Brasil client and was sanctioned by the U.S. under the Global Magnitsky Act
** Justice Flavio Dino ruled last month that foreign sanctions cannot automatically apply to Brazilian citizens
** Following the decision, Banco do Brasil said it was prepared to deal with "complex, sensitive" issues involving global regulations
** CNN Brasil, citing sources, on Monday reported that the U.S. was preparing fresh measures against the lender, linked to Bolsonaro's trial
** Banco do Brasil drops 2.3%, among the biggest fallers on Brazil's benchmark stock index Bovespa .BVSP, which slips 0.4%
** Other banks also fall: Itau BMFBOVESPA:ITUB3 down 0.8%, Bradesco BMFBOVESPA:BBDC3 off 1.1%