We propose a market for interruptible, or callable, forward contracts
for electric power, in which the consumer grants the power supplier th
e right to interrupt a given unit of load in return for a price discou
nt. The callable forward contracts are traded continuously until the t
ime of use. This allows recourse for those customers with uncertain de
mand, while risk-averse consumers can minimize their price risk by pur
chasing early. Callable forward contracts are simple in form, and can
be directly incorporated into the utility's economic dispatch procedur
e.