この「開設された口座」にあたるのがlock box account「私書箱口座」です。（UG）
MRI gave false explanation about fund management to clients
U.S. asset management firm MRI International Inc., which is suspected of mishandling clients' funds, gave false explanations that their funds were to be managed safely in a special account under U.S. banking law, some clients and other parties involved said Saturday.
According to its brochures for investors, the Nevada-based company said clients' funds were to be put in a "lock box account" opened at major U.S. bank Wells Fargo and that the funds were safe as they could be used only for trading "MARS," a securitization product based on medical institutions' claims on insurance companies.
The suspected mishandling of funds is believed to have resulted in losses totaling more than 130 billion yen.