Lustering Stock Market Companies and Finding Relationships through Corporations.

Criteria: Clustering Algorithms

I need a thorough analysis on what Clustering is and how it works. In my case, the top 100 stock market corporations. Based on revenue, profit, corporation and main locations what the relationship is between them. Why there is a distance between for example, smaller corporations and larger corporations, what this tell us, why are for example most or all the banks/oil&gas industries together and what this tell us. Using the Euclidean Space and perhaps the Markowskis theorem, measure the distance between them and elaborate on what this tells us. Perhaps you can elaborate on the current market situation and what this means for the world in general.