In a 43-page research report, the Federal Reserve has authored a rather concerning tome warning that the mechanical positive-feedback rebalancing of Leverage ETFs (LETFs) resembles the portfolio insurance strategies, which contributed to the stock market crash of October 19, 1987. The impact of LETFs on broad stock-market indexes become significant during periods of high volatility (shown empirically in 2008/9 and H2 2011) as they show that LETF rebalancing in response to a large market move could amplify the move and force them to further rebalance which may trigger a “cascade” reaction. Furthermore, executing orders within a short period of time, such as the last hour of trading, may cause disproportionate price changes (especially in financial stocks). The Fed warns that a significant price reduction at market close may also impair investor confidence with accelerating depressed prices at the closepotentially driving large investor outflows overnight.
