The underperformance on an up day suggests the market is focusing on the mix of growth versus profitability and what management’s guidance implies for the next few quarters.

• Genuine Parts shares are retreating from recent levels. What’s pressuring GPC stock?

The company reported second-quarter sales of $6.54 billion (up 6% year-over-year) driven by a 3.4% growth in comparable sales, a net 1.4% favorable impact of foreign currency, and a 1.2% benefit from acquisitions.

Analysts projected quarterly sales of $6.43 billion.

Adjusted EPS of $2.15 beat the analyst consensus estimate of $2.08.