BUENOS AIRES, Aug 3 (Reuters) - Argentina's stock, currency and bond market trends on Monday:
* The MerVal stocks index .MERV jumped 3.6 percent to its highest close in a year at 1,781.8 points, as oil sector stocks got a boost from higher oil prices
* On the broad market, stocks volume was very strong at $22.3 million. Among active issues, 38 advanced, 20 declined and 18 were unchanged.
* Prices for government bonds traded over-the-counter in Buenos Aires climbed 2.4 percent on average as confidence was lifted by a $2.25 billion payment of interest and principle on its Boden 12 bonds.
* The dollar-denominated Par bond was among the day's winners, skyrocketing 7 percent ARPARD=RASL to an ask price of 28.90.
* In formal trade between banks, the peso rose 0.07 percent to 3.825/3.8275 per dollar <ARS=RASL despite the government's debt repayment using central bank reserves.
* In informal trade between foreign exchange houses as measured by Reuters, the peso firmed 0.13 percent to 3.86/3.865 per dollar ARSB=. (Reporting by Jorge Otaola; Writing by Helen Popper, Editing by Chizu Nomiyama)