Railroad company CSX saw its shares fall more than 3% Monday after prominent hedge-fund investor Bill Ackman told CNBC, that he does not plan on discussing the railroad company, CSX CSX, +0.03% during his investor presentation slated for later today at the Ira Sohn conference in New York. Ackman is expected to be the final speaker at the widely followed investing conference. Followers may have been anticipating that the high-profile activist investor would pitch for consolidation in the railroad space , which may have helped pushed CSX's stock lower as investors were disappointed.