What is SPINNING RESERVES?
SPINNING RESERVES meaning in finance terminology / glossary / dictionary is:
Back-up energy production capacity that can be made available to a transmission system at very short notice and can operate continuously for a minimum time once it is brought online. This ancillary service is used by an independent system operator (ISO) to maintain system balance and integrity in cases of sudden increases in demand/supply for power.
reference: Sapient Global Market: 2014 GLOSSARY OF FINANCIAL TERMS