KEY TAKEAWAYSCVS Health shares lost ground in early trading Wednesday after the pharmacy giant slashed its 2024 earnings guidance again amid increased medical costs.The company reported revenue for the second quarter that missed analysts' estimates, though earnings per share beat projections.CVS also announced the departure of the head of its Aetna unit. CVS Health (CVS) shares lost ground in early trading Wednesday after the pharmacy giant slashed its 2024 earnings guidance again amid increased medical cos ...