Citibank is aiming to offer some innovation in the mortgage market, with the launch of a fixed-rate mortgage combined with a personal line of credit.The Ready Credit and Fixed Home Loan Package is really two loans bundled together. When borrowers apply for a fixed-rate mortgage they can also apply for a line of credit of up to $30,000.The current rate on the fixed-rate mortgage is 5.99 per cent for terms of one to three years. The introductory rate on the line of credit is 5.9 per cent for the first 12 months.Citibank Australia's head of mortgages, Vibha Coburn, said that for many borrowers the big negative with fixed rate loans was their inflexibility. Borrowers on fixed rates can't make extra payments or redraw funds."This product gives the fixed rate some flexibility," Coburn said.There is no annual fee, service fee or cash advance fee on the line of credit.