Wall Street ended mixed Thursday, with the Dow Jones Industrial Average flatlining while the S&P 500 and Nasdaq slipped lower, as market participants paused their rebound rally ahead of key inflation data due on Friday. However, all three major averages are still on track for a winning week.

Here's how the market settled on Thursday:

S&P 500 Index (SPY  ): -0.72% or -33.68 points to 4,667.53

Dow Jones Industrial Average (DIA  ): +0.00% or +0.53 points to 35,755.28

Nasdaq Composite Index (QQQ  ): -1.71% or -269.62 points to 15,517.37

CDC recommends older teens receive a Pfizer booster shot:

The U.S. Centers for Disease Control and Prevention (CDC) on Thursday recommended that teenagers aged 16- and 17- years-old to get a Pfizer (PFE  )-BioNTech (BNTX  ) booster shot at least six months after completing their first two doses.

The federal health regulator's recommendation followed just hours after the U.S. Food and Drug Administration expanded the vaccine's booster shot eligibility to that age group.

"Although we don't have all the answer on the Omicron variant, initial data suggests that COVID-19 boosters help broaden and strengthen the protection against Omicron and other variant," CDC Director Dr. Rochelle Walensky said in a statement. "We know that COVID-19 vaccines are safe and effective, and I strongly encourage adolescents ages 16 and 17 to get their booster if they are at least 6 months post their initial Pfizer vaccination series."

Amazon fined $1.28 billion by Italian antitrust regulators:

Amazon (AMZN  ) was fined 1.13 billion euros ($1.28 billion) on Thursday by Italian regulators who claim that the e-commerce giant has abused its market dominance.

The Autorita Garante della Concorrenza e del Mercato, or AGCM, said in a statement that Amazon has harmed competing operators in the e-commece logistics services market by encouraging sells to use its own logistics service--Fulfilment by Amazon.

ACGM said it will impose corrective steps that will be subject to review by a monitoring trustee.

Jobless fall below pre-pandemic levels last week:

New weekly unemployment claims came in well below expectations last week, reaching its lowest level since September 1969.

New jobless claims totaled 184,000 for the week ended December 4, according to the Labor Department's latest report published Thursday, coming in way below the 220,000 expected and the prior week's upwardly revised print of 227,000.

Meanwhile, continuing jobless claims also fell for the week ended Nov. 7, holding below the 2 million mark at 1.992 million.

Here's how market benchmarks started trading soon after open:

S&P 500 Index: -0.22% or -10.44 points to 4,690.77

Dow Jones Industrial Average: -0.38% or -134.51 points to 35,620.24

Nasdaq Composite Index: -0.12% or -19.58 points to 15,767.41