However, supply shortages remained elevated and production backlogs continued to build, indicating supply chains had yet to fully recover before the renewed disruption in the Strait of Hormuz. The next release of the GEP Global Supply Chain Volatility Index will be 8 a.m. About the GEP Global Supply Chain Volatility IndexThe GEP Global Supply Chain Volatility Index is produced by S&P Global and GEP. A value above 0 indicates that supply chain capacity is being stretched and supply chain volatility is increasing. A value below 0 indicates that supply chain capacity is being underutilized, reducing supply chain volatility.