Thus, virtually every category of goods available on the market today includes a subset of similar products whose "luxury" is marked by better-quality components and materials, solid construction, stylish appearance, increased durability, better performance, advanced features and so on. As such, these luxury goods retain or improve the basic functionality for which all items of a given category are originally designed.
There are also goods that are perceived as luxurious by the public simply because they play a role of status symbols as such goods tend to signify the purchasing power of those who acquire them. These items, while may not being any better (in quality, performace, or appearance) than their less expensive substitutes, are purchased with the sole purpose of displaying wealth or income of their owners. These kinds of goods are the objects of a socio-economic phenomenon called conspicuous consumption and commonly include luxury cars, expensive watches and jewelry, designer clothing, yachts, and large residences such as McMansions, urban mansions and country houses.
A luxury brand or prestige brand is a brand for which a majority of its products are luxury goods. It may also include certain brands whose names are associated with luxury, high price, or high quality, though few, if any, of their goods are currently considered luxury goods. The automobile manufacturer Hummer is an example of such a brand, as a Hummer automobile is considered a status symbol, even though none of the vehicles in the Hummer line-up meet the requirements to be classified as a luxury car.
Another market characteristic of luxury goods is their very high sensitivity to economic upturns and downturns, high profit margins as well as prices, and very tightly controlled brands. Other guidelines may apply to certain luxury markets such as the luxury vehicle market.