FORTUNE -- China's hot property market and its implications on the global economy has been on the minds of many investors, and for good reason. In January, Barclays published its latest Skyscraper Index report, which tracks links between the rise in construction of tall buildings and economic busts over the past 140 years. This could be purely coincidental, but the index suggests that the East Asian giant is the world's "biggest bubble builder," and is on its way to an economic bust. China already has half of the world's existing skyscrapers (or buildings higher than 240 meters). And it plans to add more over the next several years. However, let's not read into this too much. It's true, as Barclays notes, that the Great Depression coincided with the construction of three landmark skyscrapers across Manhattan: 40 Wall Street completed in 1929, followed by the Chrysler Building in 1930, and the Empire State Building in 1931.