>If you imagine a dial with a yellow warning at "8" and a warning redline at "9", the US is currently arguing over whether turning it from 1 to 2 is going to be the end of the world. The limit does exist, but it's a long way away.
The moment people think a currency is shaky, they get their money out of it and into something else. That leads to a huge oversupply of that currency in exchange markets, crushing exchange rates, and making the prophecy of inflation self-fulfilling. Much like borrowing, the moment people think you need to print money to survive is the moment everything goes to hell.
That being said, I think the fed's policy has been pretty reasonable. Europe and Japan have been more aggressive with monetary policy than the U.S. over the last decade, making the dollar very strong and worsening the trade imbalance.
The moment people think a currency is shaky, they get their money out of it and into something else. That leads to a huge oversupply of that currency in exchange markets, crushing exchange rates, and making the prophecy of inflation self-fulfilling. Much like borrowing, the moment people think you need to print money to survive is the moment everything goes to hell.
That being said, I think the fed's policy has been pretty reasonable. Europe and Japan have been more aggressive with monetary policy than the U.S. over the last decade, making the dollar very strong and worsening the trade imbalance.