No previous close for CALM

Do you know why there’s no previous close listed for CALM? There was one prior to the update today.

https://www.grahamvalue.com/stock/calm#bootstrap-panel--2

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Dear twheelkr,

All financial data on GrahamValue is updated cyclically once a week.

A glitch in this week's data transfer may have caused the error in the Previous Close value for Cal-Maine Foods Inc (CALM). Please check next week by when it should get automatically fixed; since it was displaying correctly earlier.

Also note that stocks that have had their Previous Close values set to Zero will not display an Intrinsic Value(%). This is done to ensure that GrahamValue errs on the side of caution, and no stocks are shown as wrongly clearing Graham's criteria.

Thank you for your forum post!