But Jeffrey Rosenberg, chief investment strategist for fixed income at BlackRock Inc., which manages $ 4.1 trillion in assets, is skeptical about the economy's ability to withstand much higher interest rates. 但是贝莱德(BlackRockInc.,BLK)固定收益首席投资策略师罗森博格(JeffreyRosenberg)对经济承受利率大幅上升的能力表示怀疑;该公司管理着4.1万亿美元的资产。