How One Firm’s Liquidity Shock Travels Through a Network

The subject in this chapter is the indirect side of firm-level uncertainty: how a tightening that first affects one firm’s working-capital liquidity can reduce the output of connected firms that have little direct exposure of their own. The focus is the direction and size of production-network spillovers, and the judgment it supports is deliberately conditional: a firm’s own credit-line exposure is only part of the risk visible in its sales. Its suppliers and customers can transmit a financial shock through goods, trade credit, and delayed production.

The distinction between direct and indirect effects matters for both analysis and management. A firm may have enough cash and an undrawn line to continue its own operations, yet depend on a supplier that must shorten payment terms or reduce deliveries. A downstream customer may then face an input shortage, a delayed shipment, or a higher need for its own working capital. The resulting output loss can appear in the customer’s accounts even though the original tightening was directed at a different firm.

The network turns liquidity into an input shock

Consider a supplier that produces an intermediate component. Its workers and other operating commitments must be financed before the customer’s final sales generate cash. If financial conditions tighten and the supplier’s working-capital line becomes less elastic, the supplier can reduce inventory, extend less trade credit, or cut production. A customer that relies on the component receives less output, receives it later, or must find an alternative source. The customer’s own production is then impaired by a liquidity shock that began upstream.

The mechanism crosses two interfaces. The first is the payment interface: the supplier may finance the customer by allowing payment after delivery, while the supplier itself waits for cash from later stages of production. The second is the goods interface: the customer needs the supplier’s input in order to produce its own output. A tightening can affect both. Less trade credit raises the customer’s immediate funding need, and less or delayed supply reduces the quantity the customer can sell.

This is why network exposure is not the same as a firm’s own debt ratio. The relevant question is not only how much the firm has borrowed, but how many cash-flow and production relationships must continue for its operating plan to work. A customer with modest direct credit-line exposure can still be sensitive to a supplier’s financing problem. A supplier can be exposed to its own bank and to the ability of its customers to pay. The network makes these dependencies part of the distribution of possible firm outcomes.

The BIS study measures spillovers in two distances. It first considers immediate links: the sectors that supply inputs directly to a firm or buy its output directly.