The Dow Jones Industrial Average is slumping Friday afternoon with shares of UnitedHealth and IBM seeing the biggest declines for the index. Shares of UnitedHealth /zigman2/quotes/210453738/composite UNH +0.68% and IBM /zigman2/quotes/203856914/composite IBM +0.19% are contributing to the index's intraday decline, as the Dow /zigman2/quotes/210598065/realtime DJIA +0.12% was most recently trading 460 points (2.1%) lower. UnitedHealth's shares are down $12.02, or 5.0%, while those of IBM are down $3.97, or 3.6%, combining for a roughly 108-point drag on the Dow. Also contributing significantly to the decline are American Express /zigman2/quotes/203805826/composite AXP -0.0100% , Caterpillar /zigman2/quotes/203434128/composite CAT -0.50% , and Raytheon Technologies Corp. /zigman2/quotes/203237915/composite RTX +0.54% . A $1 move in any one of the 30 components of the index results in a 6.78-point swing.