Turns out Schwabs t bill auto roll waits for the next auction - money can sit a week in their no interest account before the new T bill gets purchased vs. fidelity gets in to the current auction- and any extra money remains in an interest bearing account. Anyone buy with auto roll on Treasury Direct? Apparently, I read the auto roll works like Fidelity - just what happens with the remaining money not needed for the repurchase of the t bill? Goes to your bank? somewhere at TD?