This started a while back as a project for an Arduino WiFi for my actual modular synth, but I thought it'd be more fun to share here. It should work with the free version of VCV Rack.
On my Windows system, I installed it by putting the "FinanceRackModule" folder in:C:\Users\YOURUSERNAME\AppData\Local\Rack2\plugins-win-x64- Sometimes VCV looks for plugins/modules in the Document folder. - Sometimes you can drag and drop into VCV directly.
If you run a Mac or have some issues, Google away. 90% of the time I spent on this was wrestling with VCV's SDK changes from when I started it a year or so ago so I'm probably not very knowledgeable about troubleshooting manual plugin installation.
I wanted to do this for Cardinal initially, but sending HTTP requests out of the program to Yahoo Finance's API wasn't very reliable. Also, this is really stupid so spending more than a few hours on it wasn't really worth it. lol