BUZZ-John Wood Group: U.S. tax changes bode well
** Oilfield services company John Wood Group's shares up 3.7 pct, stock among top pct gainers on FTSE 250
** Co expects U.S. tax changes to have positive impact on full-year results
** Sees (Shanghai: 600481.SS - news) one-off, non-cash credit for the year ended Dec (Shanghai: 600875.SS - news) . 31 due the revaluation of net deferred tax liabilities
** John Wood (Frankfurt: JWG1.F - news) also sees FY net debt at $1.65 bln, lower than prior forecast of $1.8 bln
** Shares (Berlin: DI6.BE - news) of WG fell 26 pct last year