BUZZ-Moneysupermarket: Contracting insurance business weighs
** Price comparison site Moneysupermarket's shares down 10 pct, bottom of the Stoxx 600, after reporting a bigger-than-expected Q4 contraction in its insurance unit
** Stock set for worst day since July 2013, with a third of its 30-day avg vols gone through in the first 10 minutes of trade
** Co cites choice not to retaliate against competition's marketing activity in order to preserve margins for loss of momentum
** "Insurance is weaker in 4Q than we expected so there is arguably an upgrade foregone," Investec (LSE: INVP.L - news) analysts write in note
** Stock biggest drag on the Stoxx 600 Media Index and bottom of the FTSE mid-250 Index (venkateshasoumithri.mamidipudi.thomsonreuters.com@reuters.net)