I have read a lot of comments on these boards regarding the deadline for implementation of the new SEC daytrading margin rule. Would appreciate any help in clarifying the following: 1. I read somewhere that the deadline is Sept. 28 for one stock exchange and August 27 for another. Is this correct? If so, can someone tell me the deadline for each major exchange (NYSE, AMEX, NASDAQ)? 2. Is the SEC's implementation deadline the same as the that of the exchanges? For example, IF the deadline is August 27 for one of the exchanges, has this exchange set an earlier deadline than required by the SEC, or is each exchange allowed to set its own deadline, or what? (Someone pointed out that the rule already is in effect and that we are headed toward the final deadline for implementation -- that's why I am using the term "deadline.") 2. I also read that some brokers are implementing the rule on August 27? Are these brokers setting a deadline that is earlier than required by the stock exchanges and/or the SEC? Thanks for any enlightening info. fast P.S. I was told that this is SEC Rule 2520. Does anyone know if this is the correct designation?