Abbott Laboratories reported fourth quarter sales below expectations before the market opened on Jan. 22, sending the stock down nearly 12% from the prior day's closing. The biggest hits came from contraction in the nutrition group along with continued disruption in the diagnostics unit from volume-based procurement in China. Medical devices suffered from market share loss in electrophysiology and slower than expected uptake of continuous glucose monitors. The pharma group performed as anticipated, posting 7% growth.