Inverse Exchange-Traded Funds Versus Shorting Stocks

 | Apr 08, 2018 01:00AM ET

In bear markets, one of the tools we can benefit from with our covered call writing and put-selling strategies is inverse exchange-traded funds (ETFs). An inverse ETF is also known as a short ETF or a bear ETF. These securities are constructed to return the exact opposite performance of a certain benchmark or index. Many investors consider inverse ETFs the same as short-selling stocks, where shares are borrowed and sold at the current price in expectation of buying them back at lower price thereby generating a credit. We will not focus in on leveraged inverse ETFs because I feel they are not appropriate for most retail investors using these conservative option-selling strategies. This article will explain the mechanism of inverse ETFs and highlight the pros and cons of each investment approach.

How do inverse ETFs work?

These securities use derivatives and positions in multiple securities such that the daily gain or loss is the inverse of the traditional index. If the S&P 500 is up 2% in one day, its inverse ETF would be down 2% that same day. Each trading day the inverse ETF rebalances its investments to maintain a constant leverage ratio so the relationship between it and the associated benchmark or index will line up over the short-term but usually not longer time frames.

Disconnect between inverse ETFs and shorting results: hypothetical example

  • Index starts at $1000.00
  • After week #1, it drops to $900.00
  • After week #2, it drops to $800.00
  • After week #3, it returns to $1000.00

Results from shorting the stock (ETF)

The shares are sold at $1000.00 and bought back at $1000.00, so there no loss or gain outside of fees.

Results from using an inverse ETF

  • After week #1, the value of the security is up 10% to $1100.00 (as the index declines by 10%)
  • After week #2, the value of the inverse security is up 11.11% (resulting from the share decline from $900 to $800.00) to $1222.00
  • After week #3, the value of the security is down 25% (resulting from share appreciation from $800.00 to $1000.00) to $916.50

In this hypothetical, the inverse ETF results in a loss of $83.50 compared to the breakeven of short-selling. In the long-term, inverse ETFs tend to under-perform due to daily re-balancing of these securities.

Other factors to consider

Both strategies take advantage of declining markets but only inverse ETFs can be used in conjunction with our option-selling strategies. On the negative side, inverse ETFs come with expense ratios averaging 1%.

Short-selling will better match dollar-for-dollar the longer-term movement of the index or benchmark but short-sellers would be responsible for payment of stock dividends in certain circumstances and may be susceptible to margin call. Here is a chart summarizing the pros and cons of each strategy:

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