August is traditionally a time for financial market crises. The current one isn’t because of the usual "thin markets, long hot summer days, everyone on holiday"  scenario though, this time investors have real, concrete issues to worry about.

These were crystallized in the United States Federal Reserve’s announcement that US interest rates would stay more or less where they are until 2013 (something the Bank of England has also suggested for UK interest rates). In other words, the world’s biggest economy isn’t going to be growing in any material way for the next 18 months.