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Express Scripts ESRX reported yet another stellar quarter. We are maintaining our fair value estimate for now, but may be inclined to raise it as we gain more clarity about the effect of the NextRx acquisition on Express Scripts' financials.
Gross margin improvements have been the primary source of Express Scripts' earnings growth during the last several years. However, given that the firm's entire raison d'etre is to save clients money on their pharmaceutical costs, we are somewhat skeptical that gross margin expansion can continue at this pace for much longer.