Commonwealth Bank boss Matt Comyn confident of no "cliff" or shock when Jobkeeper ends in late March

The pandemic-driven recession has carved a big hole from the Commonwealth Bank's bottom line with its half year profit diving 21 percent to $4.9 billion. 

Australia's biggest bank has been forced to increase its provisions for bad debts from rising unemployment while record low interest rates have also eroded the CBA's business of making money. 

But CBA chief executive Matt Comyn tells ABC's Peter Ryan he's optimistic that Jobkeeper can be removed in late March without causing more hardship or another shock.