AFTER a Long Island charity that provides financial support for 190 current or former firefighters lost $614,036 in the stock market during the Internet bubble several years ago, it eventually did what many aggrieved investors do: it filed an arbitration case against its former broker, Andrew Sirico, contending that he had churned its account to rack up trading fees and had improperly invested its funds in speculative securities. Read more from Gretchen Morgenson's Article below...