BUENOS AIRES, June 9 (Reuters) - Argentina's stock, bond and currency market trends on Tuesday.
* The MerVal stocks index .MERV gained 1.01 percent to 1,641.70 points, buoyed by energy-related shares as oil prices rose.
* Shares in Tenaris (TENA.BA), which makes steel pipes for the energy industry and is weighted as almost half of the MerVal, rose 1.9 percent to 59.80 pesos per share.
* On the broad stock market, volume was modest at $11.2 million. Of active issues, 44 advanced, 24 declined and 13 were unchanged.
* Prices for government bonds traded over-the-counter in Buenos Aires gained 1.8 percent on average but traders said volume continued to be thin.
* The 2033 Discount bond denominated in dollars ARDISCD=RASL jumped 3.4 percent to an ask price of 48.40.
* Dollar-denominated Boden 2012 bonds ARBODEN12D=RASL gained 1.75 percent as investors prepare for a government auction this week tied to the early payment of a coupon that comes due in August. Participants will have to submit bids on the discount they would be willing to accept in the deal.
* In formal exchange between banks, the peso ended flat at 3.7575/3.76 per dollar ARS=RASL. Traders said the central bank sold dollars on the market to keep the peso from slumping.
* In informal trade between foreign exchange houses, as measured by Reuters, the peso weakened 0.07 percent to 3.8050/3.81 ARSB=. (Reporting by Walter Bianchi; Writing by Hilary Burke; Editing by Diane Craft)