The claim is specific: global gold ETFs allegedly recorded $4.3 billion in weekly outflows for the week ending March 27, with broad-based regional withdrawals led by North America, and that this was the second-largest weekly outflow on record. The most likely authoritative source would be a World Gold Council gold ETF flows report, as suggested by the search result for "June inflows boost H1 strength | World Gold Council." However, that source was not fetchable in this run and its snippet does not mention the March 27 week. The provided X URL also could not be fetched. Because no fetched source in this run substantively confirms or refutes the numerical claim, the statement cannot be reliably assessed beyond noting that the claim is plausible in subject matter but unverified here.