books.google.it - John Meriwether, a famously successful Wall Street trader, spent the 1980s as a partner at Salomon Brothers, establishing the best--and the brainiest--bond arbitrage group in the world. A mysterious and shy midwesterner, he knitted together a group of Ph.D.-certified arbitrageurs who rewarded him with...http://books.google.it/books/about/When_Genius_Failed.html?hl=it&id=-xgOQ6jnQooC&q=portfolio&utm_source=gb-gplus-shareWhen Genius Failed