UnitedHealth stock’s tumble is chopping more than 280 points off the Dow’s price

Shares of UnitedHealth Group Inc. UNH took an 8.8% dive toward an 18-month low, as the health insurer said it was facing higher costs from pent-up demand for surgeries. That put the stock on track for the biggest one-day decline since it tumbled 11.1% on March 18, 2020. The insurer’s stock is the highest priced component of the Dow Jones Industrial Average DJIA, which is a price-weighted index, unlike the S&P 500 SPX, which is a market-capitalization weighted index. UnitedHealth’s stock’s $43.06 price decline was shaving about 284 points off the Dow’s price. The Dow was down 162 points, or 0.5%, while the S&P 500 was…