美国国债ETF TLT空头仓位创纪录达1.505亿股

The assessment is based on a synthesis of the provided source summaries. Several sources are described as being highly relevant and directly containing the type of data needed to verify the statement. Specifically, the summaries for two sources describe them as data pages from the financial analytics website MarketBeat. One of these is noted as providing "specific figures for the short interest in the iShares 20+ Year Treasury Bond ETF (TLT), including the total number of shares sold short." The other is described as providing "specific short interest statistics for the TLT ETF, including historical data." The inclusion of historical data is crucial, as it is required to verify the "record level" aspect of the claim. Another source summary points to the existence of primary data from the Cboe exchange's "Short Interest Reports," which is the ultimate source for such figures. While there are several irrelevant sources (e.g., those on corporate bond yields or SEC filings), they do not contradict the claim; they simply address different topics. No source presented offers conflicting data, such as a different number for the short positions or evidence that a record was not set. The cumulative evidence from the relevant source summaries strongly supports the verifiability and plausibility of the statement. The existence of multiple, dedicated financial data portals that track and report this specific metric lends credibility to the claim. The lack of any contradictory evidence further strengthens this conclusion.