[top US regulator pays close attention to commercial real estate risk] the top US financial regulator said that they are stepping up their review of banks' exposure to commercial real estate. The Financial Stability Supervisory Board (Financial Stability Oversight Council) said in a statement Friday that the rate of defaulting on loans is low, but the proportion of vacant office buildings is rising. The agency was set up in the wake of the global financial crisis and includes heads of the Treasury, the Federal Reserve and the Securities and Exchange Commission.