First interview was a phone interview. About 15-20 mins with an analytics representative. Basic questions like, "tell me about your view on the market", "tell me about the most recent financial article you read", and "name 3 other companies you'd rather work for other than your current employer and Bloomberg - and why?"
Second interview was in person at HQ in NYC. 50+ people there. 2 thirty min interviews in a massive room while everyone else was doing the same.
last interview was a new visit to HQ and 1-1 with director of analytics. Offered job later that day. Really quick turn around.