Argentine stocks closed lower for the eighth week straight on Friday for the first time since 1998, dragged down by volatility in international markets and fears of a US rate hike.
Local factors compounded Friday's losses as investors liquidated shares to reinforce guarantees on futures contracts, traders said.
The MerVal leading share index closed 1.43 percent lower at 900.43 points.
Trade volume was below average at 61.8 million pesos ($21.2 million).
The index has fallen sharply in recent sessions and is down 16 percent so far this year.
"If the Brazilian stock market stabilises, we could be close to a bounce (on the MerVal)," said Mariano Tavelli, a trader with Tavelli and Co brokerage.
Gas distribution company Transportadora Gas del Sur led the MerVal's losses, falling 5.42 percent to 2.27 pesos a share.
The Argentine peso closed slightly firmer at 2.91/2.915 compared to 2.925/2.93 per dollar on Thursday.