Which kind of market model is practically prevailing in present world?

All models, the current markets are experiencing instability due to the different impact and influence economic factors, such as low oil prices, the fragility of liquidity, inflation, decline in economic growth, wars, depression, lack of employment opportunities ..... etc

Based on the type of business and location any model could be applied as the requirements of the business type and location. The points that Mr.Tarig Amin mentioned are very important too.