A Tale of Two Bailouts and Their Impact on Subprime Consumer Debt

Q1. What are the two bailout programs studied and why are they treated as natural experiments?

TARP (2008) and PPP (2020) are treated as quasi-natural experiments because they were assembled quickly during crisis conditions and were largely unanticipated, providing relatively exogenous financial shocks to markets based on the presence of eligible institutions, rather than on prior local demand for credit. Both programs had distinct structures and intended targets—TARP aimed at stabilizing financial institutions directly, while PPP aimed at supporting small business payrolls to prevent employment losses—making their differential effects on subprime consumer debt informative about the channels through which bailout design matters.

Q2. How did TARP affect subprime consumer debt and why?

Subprime consumers in markets with more TARP institutions had significantly increased debt burdens following TARP, consistent with a channel in which bank stabilization via TARP relaxed credit supply conditions (especially for lower-quality borrowers) or with a moral hazard channel in which TARP-recipient banks extended credit more aggressively knowing they had government backing. Subprime mortgages played a central role in the buildup to the GFC, growing from 2.5% to 8.4% of mortgage balances outstanding between 2001 and 2007; the finding that TARP increased rather than reduced subprime debt burdens raises concerns about whether bank stabilization programs sufficiently constrain the subsequent lending behavior of recipient institutions.

Q3. How did PPP affect subprime consumer debt and why?

PPP was associated with reduced subprime consumer debt, consistent with a channel in which the payroll support prevented the expected wave of unemployment-driven debt distress and credit score deterioration that would otherwise have converted prime consumers into subprime borrowers during the COVID-19 crisis. Prior to PPP, the COVID-19 recession—with unemployment peaking at 14.7% in April 2020—was expected to cause a ballooning of subprime consumer debt; the failure of this ballooning to materialize and the actual decline in subprime debt is attributed in part to PPP’s employment and income support function.

Q4. What are the policy implications for bailout design?

The opposite effects of TARP (which increased subprime debt) and PPP (which reduced it) yield policy implications for bailout structures and the conditions attached to bailout funds: bailouts directed at banks without explicit restrictions on subsequent lending behavior may inadvertently stimulate the accumulation of high-risk household debt, while bailouts directed at supporting household incomes and employment may reduce systemic credit risk. These findings suggest that the distribution channel of bailout funds (through banks vs. directly to households and employers) has first-order effects on the resulting debt accumulation and credit risk in the household sector.

Key concepts

TARP (Troubled Asset Relief Program) : the 2008 U.S. government program that provided capital injections to financial institutions during the Global Financial Crisis; found in this paper to be associated with increased subprime consumer debt burdens in affected markets. PPP (Paycheck Protection Program) : the 2020 U.S. government program that provided small business loans/grants to support payrolls during the COVID-19 crisis; found in this paper to be associated with reduced subprime consumer debt, opposite to TARP’s effect. subprime consumer debt : obligations of consumers with low credit scores; the paper’s key outcome measure; elevated levels associated with systemic credit risk (as seen in the buildup to the GFC) and used as a barometer of financial vulnerability in the household sector.