The Polar Vortex and Texas’ Municipal Power Market

About a week ago, an unprecedented polar vortex descended upon the southwestern United States. The deep cold forced power plants in Texas to take production offline, leading to rolling blackouts and leaving more than four million households without power. Simultaneously, demand for power rose significantly as residents attempted to heat their homes, which created a significant imbalance in the market and drove power costs sky-high. As of Friday morning, February 19, power had returned to much of the state, but significant water safety concerns remain for about 13 million Texans.[i] This systemic market failure can be attributed to a number of factors:

  • Abnormally cold temperatures froze critical infrastructure at natural gas, coal and nuclear facilities, many of which were not winterized to withstand such temperatures.
  • Snow and ice rendered renewable energy resources such as wind turbines and solar panels largely inoperable. Texas, typically one of the warmest states in the US, hadn’t equipped its turbines with cold-weather tools such as heating mechanisms or lubricants.
  • Texas’ power grid operates through the Electric Reliability Council of Texas (ERCOT), which allows utilities to buy and sell excess power into an integrated market. ERCOT, however, differs from other regional independent system operators in that it lacks connectivity to other states. This has isolated the market and created supply constraints in Texas.

Texas Electric Generation by Fuel (2019)-1

Tools to weather the storm

Texas municipal power providers are likely to feel pain on multiple fronts. Although demand has increased, revenues will likely be temporarily disrupted since providers are unable to consistently deliver power. For utilities that need to purchase additional power to meet demand, increased power prices will pressure expenses until the market is back in balance and functioning properly. However, municipal power providers possess several mechanisms to help weather volatility. They tend to benefit from unregulated rate-setting capabilities that can allow cost recovery to help recoup lost profitability.

Historically, these cost recovery mechanisms have led to solid liquidity and coverage metrics, providing an additional financial cushion for municipal power providers. Retail providers in Texas have an average of 253 days cash on hand and debt service coverage of 3.1x, while wholesale providers have an average of 360 days cash on hand and debt service coverage of 1.8x.[i] Utilities may have to dip into reserves, but I expect credit implications to be temporary. FEMA is providing aid, the inclement weather is subsiding, and the power market should stabilize.  

Lessons learned

Moving forward, I believe Texas’ power market disruption will serve as an important case study for policy and planning in the future. The disruption has highlighted vulnerabilities in critical energy infrastructure, both within the state and nationwide. With extreme weather events becoming more common, utilities and market providers must ensure they can continue to supply reliable energy to residents. I believe this point will become increasingly important as federal energy policy shifts toward more intermittent renewable resources. In my view, independent system operators should have controls in place to help maintain a functioning market. Additionally, power providers dependent on renewable energy should ensure they have access to adequate supplemental supply until battery storage technology can evolve to support baseload power generation.


New call-to-action



[i] CreditScope, as of 2/18/2021.


There is no assurance that developments will transpire as forecasted and actual results will be different. Information, including that obtained from outside sources, is believed to be correct, but Loomis Sayles cannot guarantee its accuracy.

Market conditions are extremely fluid and change frequently.

Commodity, interest and derivative trading involves substantial risk of loss.

This blog post is provided for informational purposes only and should not be construed as investment advice. Any opinions or forecasts contained herein reflect the subjective judgments and assumptions of the authors only and do not necessarily reflect the views of Loomis, Sayles & Company, L.P. Information, including that obtained from outside sources, is believed to be correct, but Loomis Sayles cannot guarantee its accuracy. This material cannot be copied, reproduced or redistributed without authorization. This information is subject to change at any time without notice. Market conditions are extremely fluid and change frequently.




About the Authors

Loomis Sayles analysts are career professionals who offer deep knowledge and experience in a diversity of global asset classes and market sectors. These dedicated experts provide the insight essential to supporting our portfolio management teams across a wide range of investment strategies.

Subscribe to Emails