The Ibovespa edged down to the 191,000 mark on Friday amid international market nervousness over Middle East tensions, as investors monitored a standoff between the US and Iran. Tehran responded to the US blockade by demonstrating its control over the Strait of Hormuz, with few signs the strait will reopen soon. Brent remained near $105, threatening to exacerbate inflation fears and global growth concerns while pressuring major banks and the broader index. Ita