They Lived Long and Prospered

Leonard Nimoy as Mr. Spock voiced the words: "Live long and prosper." He will be missed.

So will Irving Kahn, who lived those words.

Wall Street's oldest active professional investor, Kahn made his first stock trade in the summer of 1929 and became a disciple of Benjamin Graham. Until last fall he was still reporting for work three days a week at his midtown office. Kahn died at age 109.

Related post: Good Advice From a 108-Year-Old Investor.