NAB plans Friday update 04 February 2009 5:50PM National Australia Bank yesterday said it planned to publish a trading update for the December 2007 quarter ona Friday. The bank will also publish a June quarter update later in the year.Of the major banks, ANZ is the only bank to publish any quarterly commentary on a consistent basis until now.Macquarie Group, meanwhile, will conduct its annual "operational briefing" for investors in Sydney tomorrow.