Gerry....I use the websites of Nuveen and VanKampen. For Nuveen, go to Nuveen.com, select closed end fund homepage, scroll down into what look like (and are) news releases...some are marked as max rates for various dates. They have put out the new rates daily recently. On VanKampen, go to the closed end fund daily pricing page, and look to upper right for "periodic" leverage rates document -- they update about once a week. I've not tracked Eaton Vance, but their default formulas suggest their default rates are similar to Nuveen/VanK.
Dick