The strongest evidence available in this run is the search-result match to the World Gold Council page “Gold ETF Flows: March 2026” at https://www.gold.org/goldhub/data/global-gold-backed-etf-holdings-and-flows, which closely aligns with the claim’s wording about global gold-backed ETFs, a 9-tonne weekly inflow, and a reversal after four weeks of outflows. A second World Gold Council result, “Inflows supported by opposite shores | World Gold Council,” also supports the broader proposition that gold ETF inflows resumed in March 2026. However, because direct fetching of both the X post and the World Gold Council page failed, the exact numeric statement was not validated from page content in this run. That prevents a high-confidence conclusion, but the claim is more supported than contradicted.