Power means holding existing rights that currently allow the investor to direct the activities that most affect the investee's returns. Those activities differ by investee and may include buying and selling goods or services, managing financial assets including on default, acquiring or disposing of assets, research and development, and setting the funding structure; typical decisions over them are operating and capital budgets and appointing, paying and removing key managers or service providers. Rights need not have been exercised to confer power, and a track record of directing activities is supporting evidence only. Where different investors each direct different relevant activities, including activities that arise at different times, power sits with the one directing those with the greatest effect on returns. An investor may have power even where others participate in decisions, but holding only protective rights never confers power.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.