Abstract: The present invention is a computer system or method for obtaining, maintaining and controlling an exchange of tangible assets over a global computer network. In one embodiment, the present invention is a computer system having memory, the system being adapted to identify one or more art assets which may be categorized into a collective art asset pool, to obtain an initial appraisal value for the art asset pool from third party appraisers or from an automated appraisal process, to calculate an appraisal value for the art asset based upon the appraisal information it obtained, to obtain orders from potential investors and/or brokers, process such orders, to continuously monitor art asset value against appraisal information, and is further adapted to automatically switch ownership units amongst art asset pools based upon pre-defined triggering threshold events.