World's Stocks Controlled by Select Few

By Lauren Schenkman, Inside Science News Service
posted: 26 August 2009 11:13 am ET

“If you would look at this locally, it's always distributed,” Glattfelder said. “If you then look at who is at the end of these links, you find that it's the same guys, [which] is not something you'd expect from the local view.”

Based on their analysis, Glattfelder and Battiston identified the ten investment entities who are “big fish” in the most countries. The biggest fish was the Capital Group Companies, with major stakes in 36 of the 48 countries studied. In identifying these major players, the physicists accounted for secondary ownership -- owning stock in companies who then owned stock in another company -- in an attempt to quantify the potential control a given agent might have in a market.

Glattfelder added that the internationalism of these powerful companies makes it difficult to gauge their economic influence. "[With] new company structures which are so big and spanning the globe, it's hard to see what they're up to and what they're doing,” he said. Large, sparse networks dominated by a few major companies could also be more vulnerable, he said. "In network speak, if those nodes fail, that has a big effect on the network."

The results will be published in an upcoming issue of the journal Physical Review E. FULL STORY