11.   After founding his own brokerage, which failed, he became an arbitrager, a professional investor who takes positions in stocks affected by takeover bids.

12.   Brazilian stocks rose for a third straight session, led by Petroleo Brasileiro SA and utility stocks, as professional investors dominated the market.

13.   But even from deep in that hole, most professional investors say they doubt the time is right to buy those high-yield securities.

14.   But he and other professional investors question how much money companies can make selling services and products around a free operating system.

15.   But professional investors and economists are crossing their fingers.

16.   But the current wave of financial fraud is different, professional investors say.

17.   But the potential for immediate gains attracts professional investors as well as small depositors.

18.   Clearly, many professional investors are not fully convinced.

19.   Creating such deals has proved harder than many investment bankers predicted, and the securities have been so complicated that they are offered only to professional investors.

20.   Even some professional investors are throwing in the towel.