http://www.nytimes.com/2008/03/23/b...824454ed41d66cdf&ex=1206417600&pagewanted=all LIKE Noah building his ark as thunderheads gathered, Bill Gross has spent the last two years anticipating the flood that swamped Bear Stearns about 10 days ago. As manager of the worldâs biggest bond fund and custodian of nearly a trillion dollars in assets, Mr. Gross amassed a cash hoard of $50 billion in case trading partners suddenly demanded payment from his firm, Pimco.