BUZZ-RSA: best day in 6.5 yrs after Zurich confirms bid interest
** RSA poised for biggest one-day rise since February 2009 in heavy volume after Zurich confirms interest in the British insurer
** No certainty an offer will be made
** RSA, up 10.8%, 2nd-top riser on Stoxx 600, in volume 2.5x the 90-day daily avg after c.20 minutes; Zurich among top fallers on index, down 2.8%
** Comes amid consolidation in wider industry ahead of new European rules over amount insurers keep in reserve which has already prompted some deals to diversify revenue streams (RM (LSE: RM.L - news) : tricia.wright1.thomsonreuters.com@reuters.net)