** Shares in Swiss chemicals group Sika SIKA.S jump 8% after it reported a narrower-than-feared organic decline in Q1
** Sika reports sales of 2.49 billion Swiss francs ($3.19 billion), down 0.2% organically against a consensus that forecast 1.7%
** Both Vontobel and Zuercher Kantonalbank say a slight top-line beat should be received positively by the market
** The company's sales were impacted by FX and China construction but came out flat organically, exceeding expectations, Vontobel says
** Growth was driven by the rest of the Asia Pacific and demand recovery in Europe, though winter storms in the Americas caused weaker performance, Vontobel adds
($1 = 0.7804 Swiss francs)
(Reporting by Bernadette Hogg)
((bernadette.hogg@thomsonreuters.com))