BUZZ-BTG: worst day in 14 years after taking £150m impairment charge

** Pharma co BTG (Frankfurt: 908827 - news) slides 14 pct, its worst single day since 2004, after saying it will take a £150m impairment charge in its full-year results

** Says sales of its emphysema treatment PneumRx taking longer than expected to materialise, expects no material revenues from the product in the next two years

** By far the biggest faller on the Stoxx 600, trades 1.5x its 30-day average volume in the first 90 minutes on Thursday