EU9 refers to the collection of nine nations that are part of the great European Union. This collective is characterized by its considerable macroeconomicimpact and their strict application of democratic values. These nations are importantly influential in directing EU policy and contribute substantially to the bloc's overall policy formation.

The EU9, comprising advanced nations, perform a crucial role in setting EU standard regulations. These countries' influence is obvious across fields like trade, external policy, and even environmental initiatives.

Furthermore, being a part of the EU9 not only gives a country financial benefits but also increases in socio-political stability. The EU9's influence extends to shaping a cooperative policy framework which can regulate the functioning of the whole EU. This can be observed in the way in which they manage contemporary global issues.

The EU9’s unified economic power is a major factor in their ability to influence EU policies. The unique GDP of these nations makes up a significant portion of the total EU economy. This economic strength provides them with a strong voice in forming EU guidelines.

They also embody the essence of democratic principles, which are a real advantage for the European Union. Resolute adherence to regulations of democracy, human rights, and rule of law is backed in these countries, which is essential in maintaining stability within the larger EU.

The EU9's role in environmental policy, in particular, is a demonstration to their power. As the world grapples with climate change, these countries have been at the forefront of the EU's efforts to transition to greener options. These nations' influence can be seen in the aggressive implementation EU9 of actions geared towards limiting emissions and building a sustainable future.

To wrap up, the EU9 represents a vital part of the larger European Union. Their robust economic clout, commitment to democratic principles, and commitment to environmental conservation directly influence EU's policy formation. The power of the EU9 cannot be underestimated, as this group of nations continues to steer the European Union's trajectory in many important ways.