In 2017, the stock market saw significant gains, particularly in the technology and healthcare sectors, with the S&P 500 finishing the year up approximately 20%.

: The year's top performer in the S&P 500, gaining 132% following strategic cost-cutting and asset sale announcements.

: Gained 103% on the back of breakthrough results in cystic fibrosis clinical trials.

Technology was the best-performing sector of 2017, driven by high-growth "liquid leaders":

: Maker of Invisalign clear aligners, surging 131% due to explosive demand, particularly in the teen market.