The US is facing a coin shortage — and it's forcing the Federal Reserve to take the unusual step of rationing its distribution

· Fed Chair Powell said there was a shortage of coins in the US, but the Fed was working to fix it.
· "What's happened is that with the partial closure of the economy, the flow of coins through the economy ... it's kind of stopped," Powell told lawmakers on Wednesday.
· He said the shortage was partly due to mass business...