Alphabet Inc (NASDAQ: GOOGL) shares fell more than 5% Friday after the tech giant reported 4th quarter earnings for the fiscal year of 2017.

"Our business is driving great growth, with 2017 revenues of $110.9 billion, up 23% year on year, and fourth quarter revenues of $32.3 billion, up 24% year on year. Our full year operating income growth continues to underscore our core strength, and on top of this, we continue to make substantial investments for the long-term in exciting new businesses," said Ruth Porat, CFO of Alphabet.

The Tax Act was enacted on December 22, 2017 and resulted in additional tax expense of $9.9 billion in the fourth quarter of 2017 primarily due to the one-time transition tax on accumulated foreign subsidiary earnings and deferred tax impacts.

On January 31, 2018, the Board of Directors (Board) of Alphabet authorized the company to repurchase up to an additional $8,589,869,056 of its Class C capital stock. The repurchase is expected to be executed from time to time,
subject to general business and market conditions and other investment opportunities, through open market purchases or privately negotiated transactions, including through Rule 10b5-1 plans.