LONDON (Reuters) – Investors in EADS and BAE Systems are increasingly frustrated at the political wrangling over their proposed, $45-billion merger, concerned they are being frozen out of the decision-making and are unable to run their numbers.

Since news leaked out about talks between EADS (EAD.PA: Quote, Profile, Research, Stock Buzz) and BAE (BAES.L: Quote, Profile, Research, Stock Buzz) last month, fund managers say they have been given very little information about the merger and are still scratching their heads as to its value.