Add a Currency rule:

Each Country, except the Hegemonist, can hold an amount of Hegemonic Dollars (H$), which is tracked by the {{GNDT}} at the HDollars Column. This amount can be negative. A new Country starts with H$ 0 (Zero).

The Hegemonist is the issuer of H$, so e is construed to hold an infinite positive amount of it.

Give H$ 0 (Zero) to all current Countries, except the Hegemonist.
Add a Market sub-rule to Commodities:

Often, the Hegemonist may make a post with the title “Market Position #NNN”, where NNN is a unique sequential number starting at 001.

A “Market Position” Post shall state the Prices at which the Hegemonist is willing to buy Commodities from other Countries and the Prices at which e is willing to sell.

Breaking it apart, as request.