Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Vikki Velasquez is a researcher and writer ...

Choose a stock investment approach that aligns with your time and interest in research. Invest money that you won't need for at least five years to endure market volatility. Open a brokerage account ...

My last column (“Designing with comparators,” EDN, March 29, 2001, pg 56) discussed basic comparator theory, and this column adds hysteresis to comparators to eliminate multiple switching on the ...

Alliance Resource Partners, L.P., a diversified natural resource company, engages in the production and marketing of coal to utilities and industrial users in the United States. The company operates ...