Relating MMT to a company's stock value and finances can be problematic in that the company is limited by its overall value and its productive capacity in relation to its competition measured in dollars. The US government is the "monopoly" issuer of the US dollar and all values in its domestic economy use the dollar as a common unit of measure.

This is often obscured by the ability of banks to issue "credit" using dollars as a unit of measure. This accounts for the bulk of economic activity contributing to GDP, but is must be noted that credit cannot retire debt in net terms. The "net" value of the economy will always be equal to the amount of dollars Congress has created that haven't been utilized to pay a federal tax obligation, the national debt.

GDP is a very poor measure of economic health because it doesn't accurately forecast the ability of the economy to retire private sector debt. This leads to over leveraging and economic instability, even when GDP is increasing. We won't fix this until we gain an understanding of the role of money creation and taxation in balancing the "economy" and lose our obsession with the debt as an obligation of the private sector, which it is not.