S&P Global Market Intelligence presents the most read stories for the week ended Jan. 10.

1. Despite development boom, US solar industry rues 'lost opportunity'

Trade disputes and sunsetting federal subsidies have combined to inflict a year-end malaise on an otherwise booming U.S. solar market. Despite a third-quarter 2019 surge in deployments, the sector is suffering from a "lost opportunity," SEIA President and CEO Abigail Ross Hopper said recently, even as the International Energy Agency is calling on governments to accelerate the deployment of renewables to fight climate change.

2. Gas ban monitor: Mass., Calif. movements grow; pro-gas group preps $1M campaign

Several developments in December 2019 capped a wave of regulations proposed in the fall to curb the use of natural gas in residential and commercial buildings, signaling that the movement will continue to expand and the industry's response is evolving.

3. 5 key power-sector storylines to watch at US federal agencies in 2020

With a slate of key rulemakings either finalized or nearing completion, 2020 could see a slew of crucial court rulings and federal agency actions that shape the fate of the Trump administration's energy deregulatory agenda.

4. Citigroup, Jefferies dominated billion-dollar midstream M&A in 2019

Citigroup Inc. was the leading financial adviser for billion-dollar M&A deals in North America's energy pipeline industry in 2019, while Jefferies LLC came in at a close second providing those services to parties involved in buying or selling midstream companies and assets.

5. PJM capacity market auction could be delayed another year, uncertainty persists

As PJM Interconnection market participants unpack the Federal Energy Regulatory Commission's long-awaited order revising the grid operator's capacity market rules, the work needed to implement that order will most likely mean the region's next base capacity auction will have to be delayed for another year.