In general, in any sort of tax-deferred account, you have a...

In general, in any sort of tax-deferred account, you have a little more leeway to look at fund types that might be undesirable for your taxable account. If you're going to own a high-turnover, aggressive growth fund, for example, putting it in a tax-sheltered wrapper is a good idea. By the same token, a high-yield bond fund might be a good thing to put in a tax-deferred account.