All I know is the markets were jittery because this guy is supposedly an inflation dove. That's not good for the stock market in the long run.
Some would argue that a modest amount of inflation is good for stock prices. Since Mr. B is supposedly a fan of an "inflation target" some have concluded he will accept some inflation as opposed to Greenspan's no-tolerance approach.
The markets are jittery because that is their natural state. Bull markets climb a wall of worry.
What are you talking about? Stocks - ie shares of companies with an ability to increase earnings - are the only equitites with the ability to sustain themselves above & beyond inflation and having been doing it for decade after decade.