In a recent report, Willis Towers Watson finds that commercial insurance prices continued to moderate for the fourth quarter of 2015, but haven't reached negative numbers, which is good news for businesses. Aggregate prices increased by less than 1 percent, according to the London-based risk management, insurance brokerage, and financial advisory company's latest Commercial Lines Pricing Survey.

The survey compared prices charged on policies underwritten during the fourth quarter of 2015 to those charged for the same coverage during the same quarter of 2014. Willis Towers Watson found that the price changes reported by carriers continue a trend of moderation in increases that began in the first quarter of 2013.

Consistent with the results for the third quarter of 2015, workers' compensation, commercial property, and directors and officers liability insurance reported modest price decreases. Commercial auto showed the largest price increases, the survey found, with changes for most other lines falling in the low single digits. Price increases were nearly flat for large accounts and midmarket accounts, while small commercial account data indicated modest but continued increases. For specialty accounts, the survey found that prices turned slightly negative for the first time since Q4/2011.