The short-term bills that kept coming due

Russia’s GKOs were ruble-denominated government bills that matured quickly. Rather than fund its bills chiefly with long-term borrowing, the government repeatedly issued new GKOs and used the proceeds to repay earlier ones. That refinancing made the system depend on investors continuing to buy in.

The quoted rates—reported as high as 200%—were annualized yields, not necessarily the interest paid on every bill. Even so, they reflected how much reassurance investors demanded to lend to a government they increasingly feared might not repay them.

Why investors began to doubt the rollover

The arrangement could keep working as long as buyers trusted that each new issue would find a market. But falling oil prices weakened a major source of Russia’s export earnings and government revenue. At the same time, the Asian financial crisis unsettled investors across emerging markets. As confidence faded, investors became less willing to hold Russian assets, and the government faced a harder choice: offer even more enticing returns or risk failing to refinance bills as they matured.

That is the Ponzi-like feature: new borrowing was needed to meet old obligations, so confidence and continued access to fresh money mattered as much as the government’s longer-term ability to pay. Unlike a classic Ponzi fraud, however, this was public debt financing, not a secret investment operation promising fictitious profits.

When refinancing stopped working

In August 1998, Russia defaulted on domestic government debt and let the ruble fall. The crisis showed how quickly a short-term borrowing cycle could become untenable: when investors stopped rolling over bills, the government could no longer postpone the bill coming due. The high yields had bought time, but they also made each round of refinancing more expensive—and left the system especially exposed to a sudden loss of trust.