Let's say I'd like to find out how much the Fed purchased in US treasury securities in May 2022.
Here's one approach that I've been referred to.
Go to this page on TreasuryDirect:
For each item with an 'Auction Date' in May:
Download the PDF and note the SOMA value:
Then add up all these values.
When I did this for May 2022, I get $194b.
Is there a better approach to getting the total US treasury securities purchased?