* Argentina rebounds after sharp sell-off * Brazil equities record slim gains * Fed rate cut hopes underpin sentiment By Niket Nishant Oct 15 (Reuters) – Latin American stocks and currencies rebounded on Wednesday after dovish remarks from U.S. Federal Reserve Chair Jerome Powell, while Argentine equities gained ground following a turbulent Tuesday session. With a 1.01% jump, Argentina's local stock index emerged as one of the region's top gainers. Traders attributed the rebound to portfolio buybacks following a sell-off sparked by U.S. President Donald Trump linking Washington's financial lifeline to President Javier Milei's midterm election prospects. In a show of support last week, the U.S. Treasury finalized a $20 billion currency swap framework with Argentina. The Argentine wholesale

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