The world's financial system is overflowing with stocks, bonds and other financial assets -- $140 trillion worth, to be precise. The figure was released in a study by McKinsey & Co. that maps financial assets around the globe and seeks to track the flows of these assets as they move from one region to another, putting hard numbers on the oceans of capital washing up around the globe. At $140 trillion in 2005, the value of the world's financial assets hit a new peak and was more than three times as large as the total output of goods and services...