So earlier today I tried to buy a bond fund (tax free if that matters) to include in my Traditional IRA. I got a warning message from my brokerage that: "Generally, it is not beneficial to own tax exempt investments in tax advantaged accounts as tax exempt investments typically provide a lower rate of return. Additionally, you may be subject to taxes on distributions from your tax advantaged account regardless of the investment holdings in that account."
I am a little confused by this. Wouldn't I actually want lower returns in a Traditional IRA, since it is tax deferred? (As opposed to a Roth, where earnings are tax free). Please help!