The assessment is based on strong, consistent evidence from multiple highly authoritative and relevant sources. A primary financial data provider, Barchart, directly states that the S&P 500 ($SPX) daily options notional volume reached a new all-time high of $3.5 trillion. This claim is directly corroborated by a financial news article from Futunn.com, which reports the same record figure. The presence of sources from Cboe, the exclusive exchange for SPX options, lends further credibility, as they are the ultimate origin of such data, and it is common for data providers and news outlets to report on their metrics. There is no conflicting evidence. Several sources mention the $3.5 trillion figure in unrelated contexts (e.g., a company's market capitalization), but this is coincidental and does not contradict the claim about options trading volume. The combined weight of the direct, corroborating evidence from credible sources makes the statement very likely to be true.