Kohlberg Kravis Roberts has agreed to increase the pricing of the loans it is using to back the $26bn (€19bn) buyout of US merchant processes provider First Data, in a landmark move that could set precedents for the group's stalled buyouts over coming months amid riskier credit markets.

The buyout house is in talks with banks over the terms of $24bn in loans being used to finance the deal and had agreed to increase pricing by 25 basis points, broadcaster CNBC reports.