A barometer stock is a security whose performance is regarded as an indication of the overall market movement, often signaling broader economic trends. In the USA, such a stock is frequently referred to as a 'bellwether security.'
The Standard & Poor's Index, widely known as the S&P 500, is a broad-based measurement of changes in stock-market conditions based on the average performance of 500 widely held common stocks.
The Value Line Investment Survey is an investment advisory service that ranks hundreds of stocks for 'timeliness' and safety, helping investors make informed decisions based on projected stock performance.
