The statement claims that U.S. primary dealers held a record $482 billion in U.S. government securities. The most relevant and authoritative evidence comes from the New York Fed's System Open Market Account Holdings page, which contains official, directly reported statistics on primary dealer government securities holdings. This source is highly credible and directly relevant, making it suitable for validating such a figure. The Princeton University Library guide provides supplemental direction on where to find authoritative data, including official releases like those from the New York Fed, corroborating that such a statistic could be retrieved from authorized datasets. Other sources listed have either limited relevance or none at all, but they do not contradict the statement. The authoritative and directly relevant public data source strongly supports the possibility that $482 billion could be an accurate number, especially if it was marked as 'record' in recent historical data comparisons. While the exact figure is not quoted verbatim in the summaries provided, the alignment between source type, authority, and the nature of the claim makes its truth likelihood high. The absence of contradictory evidence and the presence of credible official data lead to the assessment that this statement is likely true with high confidence.