Niche lending markets helped the lender generate an interest margin of 4.9 percent in the June quarter, more than twice the sector average, according to KPMG. Heartland said it expects underlying asset growth to continue in the second half, driven by business, rural and consumer volumes, while maintaining margins.
"The key question for Heartland is can they grow their lending assets," said Matthew Goodson, managing director at Salt Funds Management.
"That they've attributed the upgrade to asset growth appears to have answered that question."
The shares rose 6.7 percent to $1.27 and earlier touched a record $1.30. The stock has surged 48 percent in the past 12 months, almost three times the 18 percent gain for the NZX 50 Index.
The company said it is currently considering a revaluation of its 10 percent stake in Harmoney Corp following the peer-to-peer lender 's $10 million capital raising, in which online auction site Trade Me Group acquired a 15 percent holding.
Heartland expects to release its complete first-half earnings in late February.