San Diego businesses kicked off 2017 on a positive note, according to an update by the San Diego Regional Chamber of Commerce.

The chamber’s Business Outlook Index reached 25.6 in January, its highest mark since March and 53 percent better than where it ended 2016.

Last month’s reading represents a huge jump from October, when pre-election business sentiment bottomed out at 9 on the index, its worst showing in years.

The Feb. 17 update elicited a hopeful response from its sponsor, Silvergate Bank.

“The strong gains seen (in January) are higher than the previous quarter’s and the previous month’s, showing that the positive movement is sustained and significant,” Dino D’Auria, Silvergate’s executive vice president and chief banking officer, said in a news release.

The release said 41 percent of survey respondents expected during the last quarter of 2016 that their revenues would climb, and 10 percent thought they would fall. In January, the share saying revenues will improve rose to about 50 percent, while only 3 percent were bracing for a decline.