The share prices of the major banks went into free fall after Westpac reported a flat profit result for the first half of 2015 of $3.6 billion. The interim results of ANZ Bank and NAB had better headline improvements, as did a quarterly update from Commonwealth Bank of Australia, but even the coincidence of a second cut in interest rates by the Reserve Bank to 2 per cent didn't stop the rout, with each dropping more than 10 per cent over the week.