Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Khadija Khartit is a strategy, investment, and funding expert, and an educator of fintech ...

A person who needs a flu checkup has aches, pain, fever, fatigue, and other symptoms of the flu, an infection caused by a virus that attacks the lungs, nose, and throat. The flu is caused when you ...