米刀最近狂涨, is a good news for an unstable financial
market, at least temporarily, I think US government and investors welcome the news, that is why stock market is up. Actually it is hard to say what is cause and what is effect. People has more confidence in US, so they come back to US for investment, buying stocks and bonds, causing demand for US dollar, hence dollar is up. On the other hand, US export is soaring, also cause demand for US dollar.
Rescuing 2F will get rid of one more uncertainty in US financial market, people's confidence on US financial assets will be enhanced, how come 米刀的信誉玩蛋? maybe there are more US dollar in circulation, but compared to collapse of US financial market, this is much less harmful.