Investment in fixed capital determines the prospects of expanded reproduction and innovative development of the economy of any country. This is why interstate investment activity is one of the key factors in passing to a new stage: a period of economic growth and fundamental restructuring of the CIS economies, effective interaction for the purpose of pulling them out of crisis and the stabilisation and recovery of national economies. These matters are of strategic importance and are common to all the CIS countries, although each of them has its own specific features requiring different tactical approaches and adjustment to real national conditions. Investment activity in each country depends largely on the possibilities and behaviour of national investors, but interstate cooperation plays an important role as well. The substantial decline in production and investment activity calls for a special approach, namely one considering that investment support for pilot sectors and projects in the real economy could become the main line of the efforts in the CIS states aimed at general stabilisation and the revival of production.