Shares of Brazil's Gerdau rise on Trump's steel tariff plans

Updates with Gerdau, CSN share moves, analyst quote

SAO PAULO, Feb 10 (Reuters) - Shares in Brazilian steelmaker Gerdau GGBR4.SA rose more than 4.5% on Monday after U.S. President Donald Trump said he planned to announce 25% tariffs on all steel and aluminium imports into the United States.

Gerdau has units in the U.S. and had previously touted its substantial operations in the country as a hedge against the risk of protectionism from Trump.

"Gerdau is typically seen as a key beneficiary in this context," BTG Pactual analysts said, though he said details of the tariffs were uncertain and that U.S. steel fundamentals were under pressure in the short term.

"While the initial reaction may be to cover shorts or look for a quick trade, we recommend some caution," they said.

Gerdau's peer CSN CSNA3.SA, which is more exposed to the Brazilian market, was up 0.5%, while Usiminas USIM5.SA gained 2.5% in an overall positive session for Brazilian equities.

The South American country is one of the largest sources of U.S. steel imports.