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The idea The idea is that if we have $\log(a+b),\qquad a\gg b$ , then we can equivalently write this as $\log a + \log(1 + b/a)$ and the second part will be small, so that one can first compare the first part(s). The power towers with base numbers larger than 1 naturally lead to such logarithms when we repeatedly take the $\log$ of them. So, there ...

This now has been discussed in Wolfram blog post by Michael Trott: Making Formulas… for Everything—From Pi to the Pink Panther to Sir Isaac Newton Here is one of the example apps from blog - go read it in full - fun! Don't miss the link to download the notebook with complete code and apps at the end of the blog.

When you say price what do you mean ? Are you talking about retrieving historical market prices for securities i.e shares or are you talking about more complex pricing such as options, futures etc ? You can use the FinancialData[] function to obtain financial data. I would take a subset of your securities and explore FinancialData[] to see what data is ...