From a valuation perspective, Chinese equities do not, at first glance, look to be a likely candidate for trouble. The PE ratios are either 12 or 15 times on MSCI China, depending on whether you include financials or not, and do not scream 'bubble'. And yet, China has been a source of worry for GMO over the past three years and continues to be one. China scares them because it looks like a bubble economy. Understanding these kinds of bubbles is important because they represent a situation in which standard valuation methodologies may fail. Just as financial stocks gave a false signal of cheapness before the GFC because the credit bubble pushed their earnings well above sustainable levels and masked the risks they were taking, so some valuation models may fail in the face of the credit, real estate, and general fixed asset investment boom in China, since it has gone on long enough to warp the models' estimation of what "normal" is. Of course, every credit bubble involves a widening divergence between perception and reality. China's case is not fundamentally different. In GMO's extensive discussion below, they have documented rapid credit growth against the background of a nationwide property bubble, the worst of Asian crony lending practices, and the appearance of a voracious and unstable shadow banking system. "Bad" credit booms generally end in banking crises and are followed by periods of lackluster economic growth. China appears to be heading in this direction.