Photo: Reuters / Carlo Allegri

Among the 10 worst performers are Metlife (-2.25%), Bank of America (-2.24%), Citigroup (-1.84%), Morgan Stanley (-1.84%), US Bancorp (-1.83%), JP Morgan (-1-54%), and American International Group (-1.39%). The 10-year bond yield alone explains 70% of the price movement of the S&P bank index during the past six months.