In the depths of Brazil’s world-worst market selloff last year, hedge-fund manager Luiz Fernando Figueiredo made a bold call. All the fretting about a dangerous financial crisis was way overblown, he said, and markets were ready to rebound.  Now, after outsize rallies this year across Brazilian financial markets, Figueiredo doesn’t talk like a man who’s ready to cash in his chips. He argues there are more profits to be made, particularly in the...