BUZZ — PREVIEW: UnitedHealth seen posting year — on — year earnings surge of 42%

* UnitedHealth Group stock dips 0.7% to $376.70 on Mon ahead of Q3 earnings due before the opening bell on Tues * The health insurer is expected to post adj. EPS of $4.14, a yr/yr increase of 41.8%, on revenue of $111.40 bln, compared with year-ago qtr's $113.16 bln rev, 82 is up 12% from three months ago * Including move on Mon, UNH shares have gained ~14% YTD vs a ~8% rise in Dow Industrials (Stephen Culp) ((stephen.culp@thomsonreuters.com)