The statement is strongly supported by multiple, high-authority sources that all point back to the same primary data originator, the Federal Reserve Bank of New York. The official press release from the NY Fed is listed as the primary source. A highly authoritative article from the American Bankers Association's journal provides the specific figure of $18.59 trillion for the third quarter. Another credible news source, NewsNation, reports this figure rounded to $18.6 trillion, directly matching the claim. This is a standard and acceptable reporting convention. Additional sources, including a data aggregator and a news outlet's social media post, further corroborate this number. There are no contradictions among the relevant sources; one source was correctly identified as irrelevant because it pertained to data from the second quarter, not the third. The consistency across a primary source and multiple high-quality secondary sources makes it highly probable that the statement is a truthful representation of the data.