个人认为最有潜力的是NYX (NDAQ is good as well)

This company has been dragged down badly with normal financial companies. While NYX is in financial category, it is much less "financial" since it makes money like Visa or Master Card and IPO listings and other services. It has nothing to do with credit crunch directly. It will buy out Amex in August 1st and 1 billion dollar announced buyback will start when acquisition completes. It has monoploy business model and made a few international strategic acquisitions recently. It is currently trading around its book value.

In my personal opinion, it is a cash cow (黑马）for the future. I dumped a large percent of my remaining cash into this stock yesterday. However this is only for wave playing which may or may not turn into long term holding.

use it own risk, do your own research.