Ninety day bills are currently yielding 7.76%, which implies distributions at 11.26% for the Macquarie convertibles, 10.96% for the Suncorp convertibles, and between 10.06% and 10.56% for Westpac, which has the highest credit rating. Returns will move as the bill rate moves in Suncorp's and Westpac's case, and those issues are sweetened further by franking credits that will attach on the distributions. Both groups have tailored the offers to attract interest from retail investors who can best use the tax break, with Suncorp accepting applications for as little as $2000, and Westpac selling its convertibles in chunks of $5000 or more.