I don't think the game actually simulates "real" transfers for the ones we don't see on the news ticker. It's my suspicion that a handful of transfers are "real" and involve a monetary transaction for the player, if only to give the impression that there's wheeling and dealing besides yours being done. The rest are just personnel changes from one team to another with no monetary exchange.
Keep in mind this is just my speculation based on EA's history for smoke and mirrors.I doubt that EA would spend the time properly coding a simulated transfer economy.