<|im_start|>user
Extract the stock ticker from the following text

Context:
Pfizer (2021).svg
Corporate logo since 2021
Pfizer World Headquarters Entrance.jpg
Headquarters on 42nd Street in Midtown Manhattan
Type	Public
Traded as	
NYSE: PFE
S&P 100 component
S&P 500 component
Industry	
Pharmaceutical
Biotechnology
Founded	1849; 174 years ago in New York City
Founders	
Charles Pfizer
Charles F. Erhart
Headquarters	New York City, U.S.
Area served	Worldwide
Key people	Albert Bourla (CEO)
Products	
Pharmaceutical drugsvaccines
Revenue	Increase US$100.3 billion (2022)
Operating income	Increase US$31.40 billion (2022)
Net income	Increase US$31.37 billion (2022)
Total assets	Increase US$197.2 billion (2022)
Total equity	Increase US$95.66 billion (2022)
Number of employees	c. 83,000 (2022)<|im_end|>
<|im_start|>assistant
NYSE: PFE<|im_end|>
