Data Update 7 for 2026: Debt and Taxes

Data Update 2026: Debt, Taxes, and the AI Capital Expenditure Boom

Key Concepts:

Debt vs. Equity: Fundamental differences in claims on cash flows, tax implications, control, and maturity.
Cost of Capital: Weighted average of cost of equity and cost of debt, used to determine optimal capital structure.
Tax Shield: Tax deductibility of interest expenses, providing a benefit to debt financing.
Default Risk: The probability of a borrower failing to meet debt obligations.
Private Credit: Lending outside traditional bank and bond markets, offering speed and flexibility but potentially higher risk.
AI Capital Expenditure (Capex): Significant investment in AI infrastructure by major tech companies and beyond.
Big Market Delusion: Overconfidence and overinvestment in potentially overhyped markets, leading to eventual correction.
Marginal Tax Rate, Effective Tax Rate, Cash Tax Rate: Different measures of tax burden with varying implications for debt financing.

I. The Fundamental Trade-off: Debt vs. Equity

The session begins by establishing the core distinction between debt and equity financing. While accountants consistently classify these on balance sheets, a fundamental understanding of their characteristics is crucial.

Key Characteristics:

Debt: Provides a contractual claim on cash flows (coupon payments, principal), with first priority in both operations and liquidation.
Equity: Represents a residual claim on cash flows, receiving what remains last in line. This inherently makes equity more expensive due to higher risk.

Beyond these core differences, debt typically offers a tax advantage (interest expense deductibility – though this varies geographically, with exceptions in the Middle East, UK, Australia, and Brazil), while equity investors generally run the business (through boards of directors or direct ownership). Debt also usually has a finite maturity, unlike equity, though exceptions like Google’s 100-year bond and UK/Canadian “consol” bonds exist. It’s emphasized that analyzing balance sheets to verify these characteristics is vital, referencing the historical need to reclassify lease commitments as debt.

II. Debunking Common Misconceptions About Debt

Several frequently cited justifications for borrowing are challenged as “false trade-offs.”

“Debt is Cheaper than Equity”: While technically true, this ignores the increased risk imposed on equity holders, potentially offsetting any cost savings. The overall cost of capital remains unchanged or increases.
“Borrowing Increases Return on Equity”: Leverage can amplify returns, but also magnifies risk. A neutral project remains neutral even with debt, and success depends on skillful project selection.
“Debt Lowers Net Income”: While interest expense reduces net income, it also reduces the equity base, potentially increasing return on equity.
“Debt Increases Risk & Lowers Ratings”: Acknowledged as true, but the ultimate goal is maximizing value, not achieving the highest possible credit rating. A company with a slightly lower rating but higher value is preferable.

III. The Real Trade-offs: Taxes and Discipline

The primary benefit of debt is the tax shield provided by interest expense deductibility. The magnitude of this benefit is directly proportional to the marginal tax rate. Countries with higher tax rates should, therefore, see greater debt utilization. However, realizing this benefit requires profitability and consideration of potential future tax rate changes.

A secondary benefit is increased managerial discipline. The obligation to make interest payments forces managers to be more cautious with investments, facing potential job loss if they fail.

The downsides include:

Increased Default Risk: Even for stable companies, debt increases the probability of default, potentially leading to bankruptcy or operational disruption (customer loss, supplier demands, employee departures).
Conflicting Incentives: Equity investors seek upside, while lenders prioritize downside protection, leading to restrictive covenants and higher interest rates.

IV. Frictional Trade-offs & Market Imperfections

Beyond the core trade-offs, several market imperfections influence debt decisions:

Bankruptcy Protection: Government guarantees (like in Korea in the 1990s) can encourage excessive borrowing.
Subsidized Debt: Loans offered at below-market rates (often to companies serving social or governmental interests) can lead to over-investment.
Control Concerns: Founders and families may prioritize maintaining control over their businesses, opting for debt even when equity might be financially optimal (particularly in regions with limited tax benefits from debt).
Restrictive Covenants: Overly stringent loan terms can hinder business operations, discouraging borrowing.
Overvalued Equity: Companies may issue equity when their stock is overpriced, effectively using an expensive currency.
Regulatory Constraints: Limits on debt ratios or interest deductibility can restrict borrowing.

The optimal debt ratio is ultimately determined by minimizing the cost of capital, balancing the benefits of the tax shield against the increasing costs of both debt and equity as leverage increases.

V. The 2025 Landscape: Taxes, Default Risk, and Debt Levels

Analysis of 2025 data reveals:

Converging Tax Rates: Global marginal corporate tax rates are converging around 25%, with a range of 23-34%.
Tax Code Efficiency: Differences between marginal and effective tax rates indicate varying levels of tax code efficiency. The US has a marginal rate of 25.63% and an effective rate of 19.38%.
Low Default Rates (But Rising Concerns): Overall default rates remained low at 1.47% in 2025, but Moody’s estimated a 9.2% probability of default for US companies, and $60 billion in corporate debt was downgraded below investment grade.
Rating Distribution: The vast majority of companies globally (97.46%) lack a bond rating. The US has a higher percentage of companies with below-investment-grade ratings.
Sectoral Debt Variations: Technology companies exhibit the highest debt comfort (interest coverage, debt-to-EBITDA) and lowest debt levels, while real estate and utilities have the opposite profile.
Book vs. Market Value Debt: Using book value for debt ratios can be misleading, as market value provides a more accurate reflection of current financing costs.

VI. The AI Capex Boom and the Rise of Private Credit

In 2025, the six major tech companies (Meta, Amazon, Alphabet, Microsoft, Oracle, and Broadcom) collectively invested approximately $400 billion in AI-related capital expenditures and acquisitions. This investment is driving a surge in debt financing.

The speaker warns of a potential “big market delusion” – overconfidence and overinvestment in AI, leading to a future correction. This is compounded by the increasing role of private credit in funding AI ventures.

Private Credit Concerns:

Faster, More Flexible Lending: While offering speed and flexibility, private credit may lower lending standards.
Risk Transfer: A correction in the AI market will impact not only equity investors but also lenders, particularly those in the private credit space.
Overselling & Sloppy Lending: The private credit market has grown rapidly due to aggressive marketing and potentially lax lending practices. A shakeout is anticipated.

The session concludes with a cautionary note, acknowledging the potential for both positive and negative outcomes from the convergence of AI investment and private credit financing. The speaker emphasizes that market corrections are a natural part of the economic cycle.