Most commonly, patients describe acute tenderness in the buttock and sciatica-like pain down the back of the thigh, calf and foot. Typical piriformis syndrome symptoms may include: 1  A dull ache in the buttock. 2  Pain down the back of the thigh, calf and foot (sciatica). 3  Pain when walking up stairs or inclines.
There are currently 10 sectors and 68 industries. Three of the 68 industries do not have companies represented in the S&P 500 Index; therefore, performance is not available for Marine, Transportation and Infrastructure, and Water Utilities.
Home \ Business Development \ Business Strategy and Analysis \ Analysis \ Industry Analysis. An industry is the collection of business firms involved in producing the same (or very similar) product. For example, the beef cattle industry involves all of the business firms involved in producing, processing and selling beef (the supply chain for beef).