BUZZ-Kingfisher: best day in 6.5 yrs on H1 beat
** UK-based home improvement retailer up 7.2 pct, biggest one-day rise since early 2011
** Stock by far & away top gainer on Stoxx 600 & FTSE 100 in robust volume
** H1 underlying PBT £440 mln vs analysts' avg forecast of £426 mln
** "France and ROW were broadly in line, with the beat coming from the UK. A flat UK gross margin suggests an opex beat," UBS (LSE: 0QNR.L - news) says
** Co, however, cautious on H2 economic backdrop in both UK and France
** CFE Research says the main risk is that a downturn in consumer spending in the UK and France will impact sales and profitability & there are also issues relating to the restructuring of the UK store estate