The assessment is based on a strong consensus among highly authoritative and relevant sources. The primary source, a news report from Bloomberg, directly states that its own proprietary 'gauge of long-dated government bonds' has reached its highest level since 2009. This claim is exceptionally credible as it comes from the entity that creates and maintains the benchmark index itself. This primary evidence is directly supported by the official Bloomberg pages for their fixed income indices, which serve as the foundation for such a claim. The statement is further corroborated by multiple other financial news outlets, such as Finimize and Yahoo Finance, which independently report the same milestone, specifically referencing the 'since 2009' timeframe. While some sources provide data on specific countries (e.g., Germany, Australia) and only confirm more recent highs, their reporting of a strong upward trend in yields is consistent with the broader global claim. Critically, there is no conflicting evidence presented in the sources. The sources that are not directly relevant (U.S. Treasury, FRED) focus on specific domestic or corporate bond markets and therefore neither support nor contradict the statement about 'global' government bond yields. The consistency across multiple, high-authority primary and secondary sources provides high confidence in the statement's truthfulness.