Trump has snapped up more than $100 million in bonds since taking office

The extensive lists filed earlier this month show that, over the course of this year, Trump has bought bonds sold by various entities, including local U.S. governments, as well as gas districts, water supply districts, hospital authorities and school boards.

Across 33 pages of filings to the U.S. Office of Government Ethics (OGE), dated Aug. 12, the president outlined 690 transactions that have taken place since he took office. The documents were made public on Tuesday.

According to CNBC calculations, the purchases had a total value of at least $100 million, assuming the lower value end listed for each disclosed transaction.