(4-traders.com) August 10, 2017 By Denitsa Koseva The recently completed sale of Bulgaria-based cloud software company Vayant Travel Technologies to the US's PROS Holding, assessed as the second largest such deal in Bulgaria to date, could help the IT sector to attract foreign investors and develop...http://www.4-traders.com/PROS-HOLDINGS-INC-55407/news/Intellinews-Sale-of-Bulgarian-airfare-search-company-to-spur-on-local-market-24940856/