Institutional Investors Expand Holdings in SPD ETF Amid Market Uncertainty LPL Financial and several other major firms significantly increased their stakes in the Simplify US Equity PLUS Downside Convexity ETF during the last quarter, reflecting a growing appetite for risk-managed equity exposure. The ETF, which employs a downside options overlay, has seen its price stabilize above $33, with a recent 1.3% uptick.12