Thank you for the information. I've seen these extreme bids and asks before the bell many times, but today we have a bid/ask of 1.38/1.39 but the PPS is 2.28 for FNMA and 2.18 for FMCC.
Either it is an ADVFN internal glitch, or a pre-market/after-hour trade for that PPS must have gone through, the MMs cannot cause it IMO