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 Here’s Where LPs See Opportunities in an Uncertain Market James Comtois New Hampshire Expands Team with New Private Markets Hire James Comtois Paying it Forward: A Fidelity CIO’s Journey to Purposeful Philanthropy Sponsored by Fidelity Investments