** Valve-maker Rotork rises 7 pct after it says itsees revenues at the top end of market expectations
** Q3 revs up 28.9 pct, order intake up 22.2 pct
** Jefferies says trading update more resilient thanexpected by market, expects low/mid-single-digit EPS upgrades
** Rally a painful one for short sellers: short positions onthe stock have more than doubled in the last month, from 2.5 pctto 6 pct, according to FCA data
** Liberum says stock's move likely exacerbated by shortbase
** Top riser on Stoxx 600