Subject: Re: OT: T-bills
You said you are buying the bills at brokerage account. But isn’t buying through auctions treasury direct is commission free and no spread cost, and thus should be better to go?

Buying new issues at my broker (I use Fidelity for most of my fixed income trades) has no fees and no spread. I used to use TreasuryDirect, but I explained earlier why I don't anymore.