Shorting Leveraged ETFs: The Role of Borrowing Costs and Rebalancing in Volatility-Decay Strategies
Leveraged ETFs provide amplified exposure to an underlying index, but their daily reset mechanism creates volatility drag, which can substantially reduce their long-term value. This raises the possibility of exploiting the effect by simultaneously shorting leveraged ETFs with opposite exposures. We examine a 50/50 short portfolio of TQQQ and SQQQ, which provides approximately neutral exposure to the Nasdaq-100 while seeking to capture volatility decay. We analyze the strategy explicitly incorporate borrowing costs. We further investigate daily and weekly rebalancing, execution timing, and tranche-based rebalancing over five-, ten-, and twenty-day horizons. The results show that borrowing costs materially reduce the apparent profitability of the strategy. Moreover, after costs, returns are concentrated in a small number of high-volatility periods, while the strategy is largely neutral during ordinary market conditions. The findings demonstrate that ignoring short-selling costs and implementation details can substantially overstate the attractiveness and robustness of volatility-decay strategies.