Power Buffer ETF Sees Decline in Steward Partners' Investment Steward Partners Investment Advisory LLC cut its stake in Innovator U.S. Equity Power Buffer ETF – July by 11.1% in Q4, selling 2,000 shares. The firm retains 16,036 shares valued at $660,000. The ETF's market cap is $855.10 million, with a P/E ratio of 26.03.3