Shares in AGL Energy (ASX:AGL) are trading 0.7 per cent higher at $15.46. Company news National Australia Bank (ASX:NAB) has released a trading update for the third quarter. The bank raised concerns about early signs of "modest" asset quality deterioration and recorded a 7 per cent fall in cash earnings in the third quarter, down to $1.55 billion. Unaudited statutory net profit came in at $1.5 billion for the third quarter. All this as the bank forges ahead with a corporate restructure that will see 2,600 employees have to reapply for jobs across three divisions. The bank says that 47 per cent of its deferral customers are receiving the JobKeeper subsidy, and it expects GDP to return to pre-Covid 19 levels in late 2022. Shares in National Australia Bank (ASX:NAB) are trading 0.8 per cent higher at $18.16 at noon.