Andrew Thorburn, chief executive officer of National Australia Bank Ltd. (NAB), adjusts his glasses during a news conference in Sydney, Australia, on Thursday, May 5, 2016. National Australia posted a 6.5 percent increase in first-half cash profit as it bucked a trend among Australia's largest lenders by decreasing bad-debt charges and as margins improved for the first time since 2011. Photographer: Brendon Thorne/Bloomberg via Getty Images