NEW YORK and LONDON, March 10, 2011 /PRNewswire/ -- MarketAxess Holdings Inc. (Nasdaq: MKTX), the operator of a leading electronic trading platform for U.S.

MIAMI, Nov. 19 /PRNewswire/ -- Astor Group has announced the hiring of Chris Dimitropoulos, formerly a Healthcare Portfolio Analyst with Citadel Investment Group.

CHICAGO, Aug. 26 /PRNewswire/ -- Citadel Solutions announced today that it has been selected by Lehman Brothers Holdings Inc. (LBHI) to provide administration services, including the creation of an asset servicing platform.

Software programs that allow for ultra-fast computerized stock trading have proven highly lucrative but also controversial, analysts say. Wall Street firms use their proprietary software to jump quickly onto even small market changes, moving millions of shares in milliseconds.

Nefarious "cloning" schemes have become shockingly routine for financial institutions, security experts say, and exhibit an increasing level of brashness.