[Deo volente]

I thought the Fed’s mandate was restricted to controlling inflation through the setting of short-term interest rates. When did the Fed become responsible for growing jobs and moderating stock prices?

[Theoria]

'When did the Fed become responsible for growing jobs and moderating stock prices?'

By in large because of the transition from a industrial economy and agricultural economy to a financial one.

The transition has resulted into more debt[.gov, individual, national], etc to cover the losses of income from the commons.

[babble-on]

You should re-read the Fed’s mandate if that’s what you thought, because you could not be more wrong.