Elkins/McSherry - Market Impact Trend Global Transaction Costs Decline Despite High Frequency Trading. November 11, 2010 See related article, Elkins/McSherry - Global Transaction Costs Decline Despite High Frequency Trading. High Frequency Trading New York Stock Exchange Transaction Costs Nasdaq Elkins Mcsherry Global Trading Related Articles Opinion: Private Markets Face Their Next Test Thomas Deinet For Members Only CTAs Suffer June Setback as Commodity Trends Unravel Stephen Taub Capital Markets, Reframed: A Corporate Defined Benefit Perspective Sponsored by Fidelity Investments