The assessment is "likely_true" with high confidence based on strong, consistent evidence from the relevant sources. Two separate news articles directly and explicitly support the statement. One source states that on a specific day, "retail investors net bought approximately $1.8 billion of the SPY ETF." Another source corroborates this, reporting that "retail investors bought $1.8 billion of SPY in a single day." The consistency of the specific figure ($1.8 billion), the asset (SPY ETF), and the investor group (retail investors) across these two sources significantly strengthens the claim's credibility. There is no conflicting information presented in any of the provided sources. The remaining three sources were deemed irrelevant as they did not address the specific claim, and therefore neither support nor contradict it. The conclusion is drawn from the direct, uncontradicted, and mutually reinforcing evidence.