ETF League Table As Of Aug. 16, 2016. Outflows from 'SPY' pushed total ETF assets for SSgA lower on Tuesday, Aug. 16. SSgA saw the largest inflows of any ETF issuer on Monday, Aug. 15. The top five ETF issuers all saw net inflows into their products on Friday, Aug. 12. The top eight ETF issuers all saw net inflows into their products on Wednesday, Aug. 10. The top six ETF issuers all saw inflows into their products on Monday, Aug. 8.