Weighted Average Cost of Capital

I. Formal Definition

The weighted average of the after-tax cost of debt and the cost of equity, weighted by their respective shares of the capital structure. WACC is the federation-recognised hurdle rate for evaluating capital deployments: any deployment expected to return less than WACC over its horizon is presumptively dilutive of enterprise value. The federation requires WACC to be computed using marginal rather than book weights, with the equity cost derived from a documented model and the debt cost reflecting current rather than historical pricing per UFMS-001:3.1(d).

II. Etymology

Developed in the corporate finance literature of the 1950s and 1960s; codified in the Modigliani Miller framework and the capital asset pricing model.

III. Federation Usage

Federation members publish WACC quarterly with full inputs disclosed. Capital deployments below WACC require a documented strategic rationale under TGS-002:2.3. WACC misstatement is a Tier-2 conduct issue. Cross-border members disclose WACC by jurisdiction.

IV. Related Terms

• capital
• roic
• capital-allocation
• capital-efficiency

V. Authoritative Citations

• UFMS-001:3.1UFMS Article III - Hurdle Rates
• TGS-002:2.3TGS Title II - WACC Disclosure

VI. Citation in BibTeX

@misc{ifo4_glossary_wacc,
  title        = {{Weighted Average Cost of Capital}},
  author       = {{IFO4 Federation Editorial Board}},
  howpublished = {{IFO4 Federation Glossary, slug \texttt{wacc}}},
  year         = {2026},
  url          = {https://ifo4.org/glossary/wacc},
  note         = {Category: Capital; key: WeightedAverageCostofCapital}
}

VII. Challenge This Definition

Federation members and accredited practitioners may challenge any entry under TGS-002:1.7. Filed challenges are routed to the editorial board, triaged into the revision register, and resolved in writing on the public docket. The slug remains stable through any revision.