• The underinvestment problem occurs when a highly leveraged firm rejects positive net present value (NPV) projects because the gains would largely accrue to creditors, not shareholders.
– First formalized by Stewart C. Myers (1977), the problem shows how financing structure can distort investment decisions and contradicts the Modigliani–Miller (M&M) idea that investment and financing are separable.
– A severe form of underinvestment is debt overhang, when debt service soaks up future cash flows that no new profitable investments are undertaken.
– Solutions require coordinated action by managers, creditors and sometimes policymakers: debt restructuring, targeted new financing, governance changes and incentive alignment are common remedies.
What is the underinvestment problem?
The underinvestment problem is an agency/financing distortion that arises when a firm carrying significant risky debt refuses or postpones investments—even profitable ones—because the incremental cash flows from those investments would largely go to existing creditors. Managers acting in shareholders’ (residual claimants’) interests therefore have reduced incentive to undertake projects whose upside accrues mainly to debtholders. The result is that socially and firm-value-enhancing projects can be left undone.
Origin and theory
– Stewart C. Myers (1977) articulated the underinvestment problem in “Determinants of Corporate Borrowing.” He argued that when debt is risky, a leveraged firm may pass up projects that would increase total firm value because the project’s benefits would mainly reduce debt principal or interest rather than benefit equity holders.
– This conclusion conflicts with the strict interpretation of the Modigliani–Miller theorem (1958), which assumes financing does not affect real investment decisions. In practice, Myers showed that financing structure can matter because of agency conflicts between debt and equity.
How underinvestment works (mechanics)
– A firm considers a project with positive NPV for the firm as a whole.
– Because existing debt has priority, most incremental cash flows would be captured by creditors (via interest or principal reduction), leaving little incremental value for current shareholders.
– Shareholders (or managers working for them) therefore decline the project, even though the project increases total firm value—hence a market failure from the perspective of efficient capital allocation.
Debt overhang: the extreme case
– Debt overhang occurs when a firm’s existing debt is so large that current and future earnings will mostly service that debt. The firm therefore can no longer credibly finance new projects (either internally or by borrowing), and positive-NPV investments are forgone.
– Debt overhang can also apply at the sovereign level, where excessive public debt discourages investment in infrastructure, education and health, slowing growth.
Consequences
– For the firm: dampened growth, missed innovation, deteriorating competitive position, lower long-term shareholder value.
– For investors: equity returns stagnate; creditors may also get worse returns if firm value erodes from underinvestment.
– For the economy: lower productivity, reduced capital formation, weaker employment and slower growth—especially in sectors or countries with high leverage.
How to detect underinvestment
Look for these warning signs:
– Low or falling capital expenditure (capex) relative to peers despite positive cash flow or market opportunities.
– High leverage ratios (debt/EBITDA, debt/equity) and low interest-coverage ratios.
– Repeated rejection of seemingly profitable projects announced in public filings.
– Management comments about “preserving cash to service debt” while market opportunities exist.
– Declining R&D or maintenance spending that precedes operational deterioration.
Practical steps to reduce or eliminate underinvestment
For managers and boards
1. Prioritize strategic capex and clearly document NPV analyses
• Create a transparent capital budgeting framework that ranks projects by expected firm-level NPV and strategic importance.
• Publish, for board review, scenarios showing who captures project returns (creditors vs equity) and why the project is still in the firm’s interest.
2. Negotiate covenant flexibility and “growth buckets”
• When possible, amend debt covenants to permit investment in specified strategic projects or to create carve-outs/“buckets” of permissible capex.
3. Restructure liabilities proactively
• Seek debt-for-equity swaps, extend maturities, lower coupon rates or otherwise reduce near-term debt service that blocks investment.
• Use convertible debt or contingent convertible instruments to make debt less likely to absorb all upside.
4. Raise equity (or hybrid capital)
• New equity injections restore capital buffers and align incentives for undertaking value-enhancing projects.
• Consider preferred stock, convertible preferreds or equity rights offerings if outright equity issuance is feasible.
5. Use ring-fenced project financing
• Finance high-return projects with separate project-level debt or third-party co-financing so returns accrue to the project’s backers, reducing conflict with existing creditors.
6. Asset sales and targeted reinvestment
• Sell non-core assets to reduce leverage and funnel proceeds into prioritized growth projects.
7. Strengthen governance and incentives
• Align management compensation with medium/long-term firm value (equity-based pay, long vesting).
• Use independent directors or special committees to evaluate investment decisions in distressed contexts.
For creditors and banks
1. Design debt that permits productive investment
• Include investment-friendly covenants, step-in financing for value-enhancing projects, or explicit exceptions for strategic capex.
2. Offer forbearance tied to investment plans
• Temporary relief or rollover financing in exchange for binding commitments to undertake particular projects that improve firm value (and thus eventual recovery for creditors).
3. Use hybrid claims
• Exchange existing debt for securities with upside participation (warrants, equitization) so creditors share in returns from future investments.
For policymakers (when sovereign or systemic)
1. Coordinate creditor relief and restructuring
• Debt reprofiling and controlled haircuts can restore fiscal space for public investment.
• International coordination (e.g., IMF, Paris Club) can reduce uncertainty and unblock investment.
2. Provide conditional financing lines
• Backstop facilities or public co-financing for public-good projects that private creditors won’t fund due to overhang.
3. Use innovative sovereign instruments
• GDP-indexed bonds or state-contingent debt can reduce rigid debt service burdens in bad states and preserve incentives to invest.
For investors and activists
1. Identify underinvestment as an opportunity
• Distressed equity investors or activist funds can pressure for restructurings, capital raises or governance changes that unlock value.
2. Use tender offers or participate in renegotiations
• Where practical, investors can help negotiate debt-equity swaps or new financing to relieve overhang.
Trade-offs and limits of solutions
– Equity raises dilute existing shareholders.
– Debt restructuring can be costly, stigmatizing and trigger rating downgrades or covenant breaches.
– Creditors may refuse concessions if recovery prospects are unclear or if moral hazard is a concern.
– In sovereign cases, political constraints and distributional impacts complicate restructuring.
Short checklist for management facing possible underinvestment
1. Assess: quantify leverage, interest coverage, capex trends and NPV of foregone projects.
2. Prioritize: identify 2–3 “value rescue” projects that must be pursued to restore competitiveness.
3. Engage: open early discussions with major creditors and key shareholders about options.
4. Propose: prepare credible restructuring / financing proposals (maturity extension, new equity, project financing).
5. Align: change compensation/governance elements to support the turnaround plan.
6. Execute: implement quick asset sales or bridge financing to unblock the highest-impact investments.
Conclusion
The underinvestment problem shows that capital structure matters for real decisions. When debt burdens make it rational (for shareholders, or their managers) to pass on profitable projects, firm value and wider economic welfare suffer. Tackling underinvestment typically requires joint action: prudent restructuring or fresh capital to reduce the immediate debt drag, contractual or covenant redesign to allow necessary investments, and governance reforms to align incentives with long-term firm value.
Sources and further reading
– Investopedia, “Underinvestment Problem”
– Myers, Stewart C., “Determinants of Corporate Borrowing,” Journal of Financial Economics, 1977.
– Modigliani, Franco and Merton H. Miller, “The Cost of Capital, Corporation Finance and the Theory of Investment,” American Economic Review, 1958.
Editor’s note: The following topics are reserved for upcoming updates and will be expanded with detailed examples and datasets.