Welcome to Market Catalyst. I'm Julie Hyman. We are 30 minutes into the US trading day.Let's get to the three market catalyst we're watching this hour. First up, of course, Fed decision day. We'll have full coverage on the rate decision.Plus, we'll get a review of Apple's new products and what our tech editor calls the strongest lineup in years. and StubHub gears up for its public debut after raising $800 million. We'll go live to the stock exchange to speak with its CEO.Let's get a check in the markets her ...