Red-flag raises

CARSON BLOCK isn't the obvious candidate to show up John Paulson, a hedge-fund star who oversees $37 billion in assets. Mr Block is 35 years old. His previous business ventures include a Shanghai storage company called Love Box Self Storage. He co-authored a book called “Doing Business in China for Dummies”. Muddy Waters Research, his latest firm, has been around for only 12 months.