Shopping for a refurbished smartphone? Pay attention to its grade: It can make or break your purchase. Just like in school, refurbished phones get graded on a scale of A, B, C, and sometimes lower.

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. David Kindness is a Certified Public ...

Find out how GDP can help measure the health of a country’s economy Michael Boyle is an experienced financial professional with more than 10 years working with financial planning, derivatives, ...

CNN’s Fear & Greed Index is a way to gauge stock market movements and whether stocks are fairly priced. The index uses seven market indicators to help answer the question: What emotion is driving the ...

Objective To investigate the occurrence of unintentional injuries among children aged 3 to 12 in China over the past 5 years, and to provide a scientific basis for the prevention and control of such ...

A.I. search tools, chatbots and social media are associated with lower cognitive performance, studies say. What to do? By Brian X. Chen Many corporate interests that have donated to the president’s ...

Early-stage lung adenocarcinoma alters DNA methylation, mRNA transcription, and protein expression in adjacent tissues, exhibiting either steep changes at the tumor boundaries or shallow changes ...

The CBD creams we’ve found to be most effective for pain tend to have other ingredients that create a cooling sensation for pain relief. It’s hard to say which ingredient is offering the bulk of the ...