This thread has really lost track of the original question....
"Does it help to work in NYC ?"
As a trader who has traded professionally both in Florida and NYC, I can say it definitely depends on your style of trading and experience. If you know exactly what you're doing , then no, theres no added value to trading from New York. If you're trying to get your feet wet, then NY is the best place to start in the US, especially if you're an equities prop trader, sell-side trader, or buy-side trader. There is no other city in the US that offers as many opportunities to entry level and experienced traders with as much opportunity for success. Yeah there could be one or two firms in LA or Phoenix that trade the product of the month, but if any of these places close up shop (which happens OFTEN ), you're left in the dust after just relocating. When you're starting out, you want to be around the most talented traders in a stable, profitable firm. With respect to these qualities, NY is unmatched (except maybe fairfield county , Connecticut). Also, if you're trying to get involved with futures, I would have to say New York is NOT an option, as all the major futures firms are concentrated around the CBOT and CME in Chicago.