Market Place; I.M.F. Aid Package Buoys the Argentine Markets, for Now
Investors respond favorably, but cautiously, to $8 billion aid package for Argentina announced by International Monetary Fund, with bond and stock prices rising across Latin America; but some analysts say aid only buys Argentina some time and fails to squelch prospects of more drastic measures, inclujding restructing of debt; Argentina has been in recession for three years, and some analysts argue that steep spending cuts required for aid package would make slump worse; graph; photo (Market Place column) (M)