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Manipulate financial data before exporting it?

Posted 11 months ago
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My goal is to curate the following data before I export it as a csv to open in Excel. I have downloaded financial data for more than one asset, like the following:

test2 = FinancialData[#, {{2000, 1, 1}, {2000, 1, 20}}] & /@ {"GS", 
   "MS", "BAC"}

Step 1.

I would like to insert the asset's label to the start of each series, to read

{{GS, {{2000,1,3}, 88.313}, {{2000,1,4}, 82.75},...,

I have tried to combine MapThread with Insert but nothing worked.

Step 2.

The second step is to organise the data in such a way that I can export it as a .csv to read like the following: curated data

I can break apart dates and values by combining Flatten and Transpose, but all in two columns, as opposed to two columns for each asset (moreover, Transpose doesn't work when I add the assets' labels).

How to manipulate the data to look like the spreadsheet above when I export it?


The answer provided by rhermans at StackExchange was perfect!

  names = {"GS", "MS", "BAC"},
  dates = {{2000, 1, 1}, {2000, 1, 20}},
  filename = "spreadsheet.xls",
 data = Map[
       dates], {# <> " date", # <> " value"}]] &, names];
 File@Export[filename, Transpose[Flatten[data, 1]]]
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