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 ...

Warren Buffett has frequently recommended that non-professional investors periodically buy shares of an S&P 500 index fund. The Vanguard S&P 500 ETF offers easy exposure to many of the most ...

As bitcoin BTC $89,493.41 struggles to hold above $90,000, market sentiment has once again slipped into extreme fear. Over the past year, fear or extreme fear has accounted for more than 30% of all ...

Abstract: The refractometric analysis of ethanol–water mixtures is hampered because this type of binary solution does not present a linear behavior. In this letter, a multimode graded-index fiber (GIF ...

Vikki Velasquez is a researcher and writer who has managed, coordinated, and directed various community and nonprofit organizations. She has conducted in-depth research on social and economic issues ...

Cult smartwatch maker Pebble has devised a new kind of smart ring, one with a single primary purpose. It’s called the Pebble Index 01. The Pebble Index 01 is a smart ring that does not count your ...

Pebble is on a roll—happily skipping along a calm lake, if you will. The resurrected smartwatch company recovered its trademarked name a few months ago, shipped all its new Pebble 2 Duo watches, and ...

Nearly a decade after Pebble’s nascent smartwatch empire crumbled, the brand is staging a comeback with new wearables. The Pebble Core Duo 2 and Core Time 2 are a natural evolution of the company’s ...

Pebble has officially entered the smart ring arena—yet, in true Pebble fashion, the company is completely ignoring the rules set by the likes of Oura, Samsung, and Ultrahuman. The Pebble Index 01 is a ...