Relate the information of Westpac Banking Corporation to answer following question:
Evaluate the Equity Security Analysis and Market Efficiency by using financial statement information and ‘other media’ releases (e-news articles or commentary by financing journalists or the company itself) between 31 December 2017 and 30 April 2018 and market valuation methods. a. Change in share price within 7 days of the release of the half-year report: Track and report any change in your selected company’s share price within 7 days of the release of your company’s half yearly financial report (provide evidence of this change tracking). What information in the half yearly financial report may have caused this change? If there is nothing in the report to warrant this share price change, then identify any market event that may be related to this share price change.