Financial capital can refer to money used by entrepreneurs and businesses to buy what they need to make their products or provide their services or to that sector of the economy based on its operation, i.e. retail, corporate, investment banking, ect.

Financial capital vs. real capital
Financial capital refers to the funds provided by lenders (and investors) to businesses to purchase real capital equipment for producing goods/services. Real capital comprises physical goods that assist in the production of other goods and services, eg. shovels for gravediggers, sewing machines for tailors, or machinery and tooling for factories.