BUZZ-AVEVA: best day in 9 yrs on Schneider deal

** AVEVA shares poised for one of their best days ever after Schneider Electric (Swiss: SNE.SW - news) reverse takeover

** Shares (Frankfurt: DI6.F - news) of AVEVA soar 30 pct -- a 10 standard dev move -- and are by far the best performers across Europe's top benchmark

** Schneider says it will pay AVEVA 550 mln pounds towards the issue of new shares in Aveva. Schneider will own 53.5% of the enlarged Aveva

** Deal structured to avoid creating an auction of AVEVA, Jefferies says, as terms lock in a premium valuation for UK group

** Liberum -- top-ranked for recommendation accuracy on Aveva, according to StarMine -- says taking into account the cash received, AVEVA is paying c.2.3x EV/Sales (20% margin) & c.11x EV/EBITDA for Schneider Software which seems good value

** Broker flags the deal will diversify AVEVA out of oil & gas into Chemicals, Food & Beverage, Mining, Water & Waste Water

** AVEVA easily the top UK mid-cap riser on the day & most actively traded stock on index; Schneider up 0.2% (RM (LSE: RM.L - news) : tricia.wright1.thomsonreuters.com@reuters.net)