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Limited data for the Morningstar value_score field

I'm experimenting with the Morningstar value_score field, but I'm finding that the data is limited, specifically the data seems to come online for a single security (SCCO) on 2009-03-18, and then be added for other securities over subsequent months. Is this the limit of the data available to Quantopian? The Morningstar style box definitely predates 2009, although I'm not sure about the precise value_score field available on Quantopian. In any case, I am wondering the reason behind this data limit before I try to work around it.

See the attached notebook for an example.

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