The U.S. stock market is in the midst of its most persistent upswing in nearly two years, according to a technical indicator called the New York Stock Exchange Tick Index that is followed by many day ...

(Bloomberg) -- At the depths of Thursday’s stock rout, a second-by-second measure of investor selling registered its most extreme reading ever. The number of stocks falling on the New York Stock ...

At the moment, FTSE distributes its index data on a snapshot basis with index values calculated and distributed at time intervals ranging from every 15 seconds to one minute. "We have just started ...