Comment Re:Global Warning (Score 1) 877
Market share, in strategic management and marketing, is the percentage or proportion of the total available market or market segment that is being serviced by a company.
-Wikipedia
If the size of the market is halved aribtrarily, than everyone's market share remains the same. However, if there is a bias (e.g. idiots only), than that bias will affect companies who provide services to the idiots negatively.