In financial contexts, what does the term backstop most closely refer to?

• A. Primary funding source
• B. A long-term loan
• C. Stock issuance
• D. Backup liquidity

Answer: (D)

Backstop means a guarantee of funding or liquidity that kicks in if other sources fall short. It acts as a safety net to ensure a financing plan can be completed even if not all participants commit. That’s why it’s best described as backup liquidity—the provision of available funds to cover shortfalls rather than the primary source of financing. It isn’t typically a long-term loan you carry for years, and it isn’t the act of issuing stock itself. A common example is an underwriter promising to buy any unsubscribed shares in a rights offering, ensuring the target amount is raised, or a bank providing a facility to supply needed funds during a crisis to maintain liquidity.