William J. "Bill" Meehan, the chief market analyst with Cantor Fitzgerald -- a leading institutional brokerage and research company -- and a noted market commentator for TheStreet.com and CNBC, is presumed dead after last Tuesday's attack on the World Trade Center towers. He was 49 years old. Known for his savvy commentary on the financial markets, Meehan gained a worldwide following among investors by explaining the Dow's gyrations in a style that was incisive, yet cool. In his reports, called "The Meehan Notes," Meehan would expertly make his bear-market calls and then remind readers of his passion for rock-and-roll music by saying he was off to "the wilds of Jersey" to see the Beach Boys, Paul Simon or Jethro Tull. In Meehan's last column for RealMoney.com, published the day before his death, he noted that the folks at Intel say revenue will improve. In classic Meehan style, he wrote: "Insert parrot here, and not one of the Monty Python variety." While his writing had the color and energy of a vintage Rolling Stone article, Meehan was one of the most knowledgeable -- and accurate -- market commentators of recent times. Not only did he predict the beginning of the bear market, which has now entered its 18th month, he called the market bottom in April, almost to the day. Unlike many other market commentators, who frequently ignore many of their past predictions that founder, Meehan would note which of his calls had been wrong and explain what had happened. Given his proclivity for trading, it comes as a surprise that stocks were not Meehan's first vocation. Growing up in the Bronx, he attended Cardinal Spellman High School. He skipped college to begin a career in advertising, but soon decided he preferred stocks to ads. He joined Prudential Securities as a broker in the late 1980s in the company's office in Lexington, Ky., and returned to New York some 10 years ago to work in Prudential Securities' national sales organization. Meehan eventually became vice president, market analyst and national sales desk manager at Prudential's New York office. He joined Cantor Fitzgerald in 1997 as a senior vice president and chief market analyst. In August, Meehan began working from an office at Cantor Fitzgerald on the 105th floor of the World Trade Center's North Tower, the building first hit by a hijacked plane last Tuesday. Meehan is survived by his wife, Maureen; two sons, William, 20, and Daniel, 16; and a daughter, Katie, 10. A memorial service is being held for him on Sept. 30 at 2 p.m. at the Noroton Presbyterian Church, 2011 Post Road, Darien, Conn., 06820. In his name, the family created the Meehan Children's Education Fund for his children. Donations can be sent to it, care of Maureen Meehan, at P.O. Box 1214, Stamford, Ct., 06904-1214. I've asked some of TheStreet.com's commentators and staff to share their memories of Bill Meehan. Please see their tributes listed in the box above. We know many of you have personal recollections of ways in which Bill Meehan touched your lives. We welcome your email at firstname.lastname@example.org, and we'll do our best to compile a special tribute from our readers.