Volume speculation at brokerage working in the purchase and sale of oil and gas tankers.

The size and location of natural disasters, political and security, especially if they are in places of the export and the impact caused directly and indirectly in the volume of demand.

Increased industrial and economic growth in many countries, especially not enough volume production needs, or do not have the energy sources required.

Recent discoveries of oil and natural gas that may be found in the exporting countries or other states and the cost of production.

The size and number of refineries in the world and the adequacy and efficiency of production.

The size of the growing demand for energy sources in the world and the subsequent lack of production is not consistent with the volume of demand.

The willingness of global industrial basins to accommodate new applications for building tankers, which follows other costs have an impact on achievement.

International maritime laws and their impact on the volume of investment in the maritime transport sector.

The internal laws of some countries on the Harbor Master and Gate Pass marine activities and the volume of taxes and other costs.

Costs and expenses maritime insurance coverage for maritime disasters that are difficult to clearly ill.

Volume competition in the area of operation by national companies in the Gulf.

The big change in the price of renting or buying tankers what is contained in the study.

The absence of meaningful transfer opportunities contribute in reducing expenses.

Large fluctuations in exchange rates and taxes in Ports States.

Changes in items maritime laws in the States exported or imported.

Deficiencies in the cash flows.