The assessment is "likely_true" with high confidence based on strong, consistent evidence from credible sources. The most authoritative source, Trading Economics, directly supports the claim by stating the yield rose to 3.51%, which means it surpassed the 3.50% mark. Another reliable source, a social media post from the financial data company Barchart, explicitly reports that the yield jumped to 3.5% and called it a historic high, directly confirming the statement. A second post from the same company reporting a spike to 3.465% further corroborates the event of a significant and historic rise to a level very close to 3.50%; this minor difference in value likely reflects intraday volatility and does not contradict the core claim. The conflicting information from a Reddit post is discounted due to its very low authority. The source regarding the 10-year bond is irrelevant. The convergence of evidence from two distinct, reliable financial data providers strongly supports the truthfulness of the statement.