Applying the “anticipatory filing” exception to the first-to-file rule — in a declaratory judgment case involving allegations that indiscreet emails undermined an expert witness’s credibility in high stakes stock appraisal litigation — U.S. District Judge John Robert Blakey dismissed the complaints that Coherent Economics, San Marino Business Partners and Prof. Bradford Cornell filed in Chicago after they received demands from their former client, Verition Partners Masters Fund, for $25.2 million in damages.The “mirror …