Okla. Stat. tit. 12A, § 12A-2-724: Admissibility of Market Quotations

Whenever the prevailing price or value of any goods regularly

bought and sold in any established commodity market is in issue,

reports in official publications or trade journals or in newspapers

or periodicals of general circulation published as the reports of

such market shall be admissible in evidence. The circumstances of

the preparation of such a report, may be shown to affect its weight

but not its admissibility.