BUENOS AIRES, Sept 1 (Reuters) - Argentina's stock, currency and bond market trends on Tuesday:
* MerVal stocks index .MERV plunged 2.14 percent to 1,743.64 points, following Wall Street lower on uncertainty over the U.S. banking system and doubts over recent stock market gains.
* Pampa Energia PAM.BA fell 4.38 percent to end at 1.53 pesos per share.
* On the broad market, stocks volume swelled to $16.5 million. Of active issues 14 advanced, 48 declined and 13 were unchanged.
* Prices for government bonds traded over-the-counter in Buenos Aires fell slightly 0.2 percent due to profit taking by institutional investors.
* The dollar-denominated Disc 2033 ARDISCD=RASL fell 2.7 percent to end at 58.50.
* In formal exchange between banks the peso firmed 0.13 percent to 3.8450/3.8475 per dollar ARS=RASL.
* In informal trade between foreign exchange houses, as measured by Reuters, the peso weakened 0.19 percent to end at 3.8475/3.8525 ARSB=.