Thanksgiving items are running out of stock, prices are shooting upward, and retailers are cutting down on promotions, according to a recent market analysis report from IRI, a research firm that tracks retail sales in the United States. The continuing supply chain issues are impacting stores across the country with supermarkets and stores making adjustments with what’s available, and consumers rushing in and purchasing early on to ensure enough supply before shelves turn empty. IRI tracks a variety of holiday-related items to gauge their availability, demand, price, and promotion for the two holidays that drive the most sales for retailers—Thanksgiving and Christmas. This measure includes the top 25 Thanksgiving-related product categories that account for 81 percent of the $2.2 billion in sales uplift typically seen in the four weeks running up to the festive season. Based on the latest IRI report, sales uplift was 63 percent for the three-week period …