Need Help Filling Many Cols and Rows using Mixed References in VBA

[ransomedbyfire]

I am working on a spreadsheet that has dates down column A and stock symbols across row 1. For each cell, I need to make calculations that reference both the symbol and the date the cell corresponds to. I have gotten the first column down fine; but when I start moving to columns 2 through infinity, I'm not sure how to get the references to stay accurate within the VBA code. Any suggestions?

Thank you!