Quote from dvegadvol:
HTrader, et. al.
I've traded fx for some time (15+ yrs now, yikes!) and maybe I can give you a bit of perspective about what goes on in this market.
Profit Centers:
Spread Capture - certainly the engine that drives any large trading operation. One moneycenter bank controls about 12% of the entire market's volume daily. Some institutions are pure capture desks, thereby 'limiting' risk to the bank. Some operate as an agency desk where clients accept an add-on 'fee' for execution of an order, others make a price and cover the resulting position in the interbank market. How and when the position is covered is determined by management - some will allow a senior trader to hold large positions for their entire trading day, while others insist on rapid closing out. A large desk will probably earn >75% of gross income from this activity (across spot, fwd and derivative trading).
Proprietary Trading - This center has the greatest variance in p/l and activity across banks. Some don't allow it, others actively encourage prop trading. No bank approaches the size and scope of the large global macro funds, however. (For that matter, the large global macro funds pretty much don't take those sorts of positions anymore either and most have ceased to be.) There are global desks taking macro positions, but the majority of them use derivatives rather than spot and fwds.
Cheers