BUZZ-Cyren Ltd: UK trade union to use its cyber-security service
** Israeli cybersecurity software company's U.S.-listed shares up 3.4 pct at $1.82
** More than 5.5 mln shares traded by 11:00 am ET, more than double their 10-day moving average
** Says IT services provider Reliable Networks signs up one of UK's largest trade unions to use Cyren (NasdaqCM: CYRN - news) 's cloud-based web security services
** Up to Wednesday's close, stock had fallen 41 pct in last 12 months