One pundit following the company envisions notable improvements in both UnitedHealth and Optum.An analyst's price target increase for UnitedHealth Group (UNH +4.67%) stock was taken to heart by investors on Wednesday. Following news of the boost, they collectively pushed the large health insurer's stock up by almost 5% that trading session. 14% more optimisticThe person behind the raise was Wolfe Research prognosticator Justin Lake. Well before market open that day, he upped his price target on UnitedHealth ...