have led to wider bid- offer spreads Percentage change in New York State Stock Transfer Tax versus changes on bid-ask spread on sample stocks, NYSE & AMEX exchanges 2 Jun-33 1.5 Mar-32 1 0.5 Oct-81 Jan-45 EFTA01464331 -0.6% -0.4% -0.2% Aug-78 Oct-79 0 Oct-80 -0.5 0.0% 0.2% 0.4% 0.6% 0.