** U.S.-listed shares of Argentine companies gain in premarket trading after President Javier Milei's party won midterm elections
** Milei's party secures strong mandate, bolstering support to keep pushing through his radical overhaul of the economy
** Financials including Grupo Supervielle SUPV.N, Banco Macro BMA.N, Banco BBVA Argentina BBAR.N and Grupo Financiero Galicia GGAL.O rise between 24.7% and 41%
** State-run oil company YPF YPF.N advance 22.5%, gas transportation firm TGS TGS.N up 7.5% and energy company Pampa Energia PAM.N climbs 20%
** Global X MSCI Argentina ETF ARGT.P adds 17.3%, after falling 10.2% year-to-date through Friday
(Reporting by Ragini Mathur in Bengaluru)
((Ragini.Mathur@thomsonreuters.com;))