Shares of Nike and Walgreens Boots are trading lower Thursday morning, sending the Dow Jones Industrial Average into negative territory. The Dow DJIA, -0.77% was most recently trading 222 points, or 0.7%, lower, as shares of Nike NKE, -4.75% and Walgreens Boots WBA, -2.55% have contributed to the index’s intraday decline. Nike’s shares have fallen $5.92 (4.4%) while those of Walgreens Boots are off $1.22 (2.4%), combining for a roughly 47-point drag on the Dow. Chevron CVX, -1.85%, Boeing BA, -2.07%, and Caterpillar CAT, -1.77% are also contributing significantly to the decline. A $1 move in any one of the 30 components of the index equates to a 6.58-point swing.