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.
A global industry can be defined as: 1  An industry in which firms must compete in all world markets of that product in order to survive. 2  An industry in which a firm's competitive advantage depends on economies of scale and economies of scope gained across markets. Some industries are more suited for globalization than are others. The following drivers determine an industry's globalization potential.