Hello everyone, I hope everyone is doing well!

I'm currently trying to do a regression of several dependent variables and independent variables. The issue I'm currently facing is that Stata will always omit my independent variable, Volume, because of collinearity. I tried to regress Volume to other independent variables without changing the model but have found no clue as to what needs to be done.

I have attached the excel files used in the regression. The file 'ACES Daily' contains the raw data and my calculation of the them, and the file 'Compiled' is the excel file used in the regression which simply contains the data written in bold at the bottom of 'ACES Daily'.

Help would be very much appreciated!
Have a great day!

Warmest regards,
Robby

Edit: I forgot to include the model, it is now attached. Liq being the dependent variables: RS, RtoV, RtoTR, and ZeRet.