Why is Morningstar reporting a bid/ask spread of .31 (2.19%) when Vanguard reports a 30-day average of [CO].02 (0.02%)
Vanguard, on their page which lists the 30 day average bid/ask spread for their various ETFs, currently has 0.02% and [CO].02 as the spread for VTI:
However, if I lookup VTI on Morningstar, it has a bid/ask spread of .31, or 2.19%.:
Is it really true that the current bid/ask spread is over 115 times the 30-day average? Why is Morningstar's quote for the current bid/ask spread number so much larger than the 30-day average listed by Vanguard?
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The bid/ask spread changes constantly (even on heavily traded funds or securities); right now the B/A/S was 0.02% when I checked a few minutes ago, and is now 0.05%. That's why Vanguard gives the average 30 day B/A/S (and probably specifically the average during market open periods).
I guess you just looked in at a time that happened to have few people interested in buying or selling VTI - perhaps because the market was closed when you checked, and with the market heading down there wasn't too much interest in selling until it's clear whether the market was going to settle at open or continue down (which it did).
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