If Argentina dollarizes, it could lead to a significant investment in US government debt, potentially driving down US long-term interest rates and triggering a US stock market rally.
"if Argentina under mle does adopt the US dollar as its legal tender its impact could reverberate internationally let's look at one plausible scenario if Steve's figures on the amount of US dollars in circulation in Argentina are correct and the country does dollarize this could lead to a much needed influx of money back into its banking system in response Argentine financial institutions along with the government May then opt to invest a substantial portion of this capital in US Government debt adding it to their balance sheets such a large-scale acquisition of US government bonds could potentially drive down long-term interest rates in the United States in turn if these interest rates were to fall it could act as a catalyst for a rally in the US Stock Market as lower interest rates often make stocks more attractive to investors"
