Key Takeaways Cannabis ETFs surged on optimism around potential U.S. marijuana reclassification reforms.Precious metals ETFs gained as silver, gold and platinum prices climbed on supply concerns.Space and health care ETFs advanced on sector-specific growth drivers.Wall Street was upbeat last week. The S&P 500 lost 0.6%, the Dow Jones advanced 1.1% and the Nasdaq retreated about 1.6% last week. The tech stocks were beaten down, taking a toll on the Nasdaq-100 as well as the S&P 500. Roundhill Magnificent Sev ...