T-Mobile and Pfizer showed strong performances in their Q4 earnings reports, with both companies beating expectations and providing positive guidance for the future. T-Mobile's stock climbed after reporting strong net customer adds, boosting their earnings. Meanwhile, Pfizer's stock also climbed on their revenue and earnings beat, along with reaffirmed guidance for the upcoming quarters.

On the other hand, Tractor Supply saw their stock slide after narrowly missing earnings estimates for Q4 and providing weaker-than-expected guidance for the future. The company faced challenges in the supply chain disruptions and higher costs, impacting their profitability and outlook.

Investors are closely monitoring these Q4 earnings reports as they provide insights into the financial health and performance of these companies. Positive results like those from T-Mobile and Pfizer can boost investor confidence, while disappointing reports like Tractor Supply's can lead to stock declines.

Overall, the Q4 earnings season has shown a mix of outcomes for companies, with some exceeding expectations and others falling short. As the market continues to digest these reports, analysts will be closely watching for any trends or indicators of future performance in the stock market.