BUENOS AIRES, Feb 20 (Reuters) - Argentina's stock, currency and bond market trends on Friday:
* The benchmark MerVal stocks index .MERV shed 1.59 percent to 1,048.63 points as bourses throughout the region fell on revived worries over a prolonged global recession.
* The index lost 7.6 percent over the course of the week.
* Friday's losses were led by aluminum company Aluar (ALU.BA), which dropped 7.6 percent to 1.70 pesos a share.
* On the broad market, volume was weak at $10.5 million. Among active issues, 9 advanced, 38 declined and 6 ended unchanged.
* Government bonds traded over the counter in Buenos Aires plunged 2.8 percent on average as investors were seized once again by an aversion to risky assets.
* The dollar-denominated 2033 Discount bond ARDISCD=RASL sank 4.8 percent, according to the ask price.
* In formal exchange between banks, where the central bank regularly intervenes to avoid abrupt movements, the peso weakened 0.07 percent to 3.5350/3.5375 per dollar ARS=RASL.
* In informal trade between foreign exchange houses, as measured by Reuters, the peso currency slumped 0.41 percent to 3.62/3.6250 ARSB=, its lowest level since November 2002. (Reporting by Walter Bianchi and Jorge Otaola; Writing by Hilary Burke; Editing by Dan Grebler)