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etf-education
ETF Education

ETF Spreads and Volatile Markets

05/15/2019
Michael Barrer, Associate Director of Capital Markets


On Monday, May 13, 2019, U.S. markets had their second-worst trading day of the year, with the S&P 500 down 2.41% and volatility, as measured by the Volatility Index (VIX), spiked by 28.12%. This got us thinking about a question many investors ask during times of stress: “What happens to ETF spreads?"

 

The key factor to remember is that an ETF is a derivative, a wrapper around a basket of securities. Spreads in the ETF are derived from multiple factors, first and foremost by spreads in the underlying securities. When volatility spikes, spreads in many underlying securities also widen, which can trickle down to spreads of ETFs. Another major factor that goes into the pricing of ETF bid/ask spreads is volatility and risk in the market. In a fast-moving market, there is more risk to market makers, that they will not be able to hedge their position fast enough at the levels they expected. This inherent risk can sometimes be reflected in widening ETF spreads to compensate market makers for the additional risk they take for providing liquidity during these market conditions. 

 

Are wider spreads a given in volatile markets? No. Because of the exchange-traded nature of ETFs, some funds act as liquidity vehicles that market participants can flock to during times of market stress, when the underlying asset class is less accessible. Because of the natural two-way trading in these funds, spreads may be tighter than what would be expected in the underlying market. This additional added layer of liquidity that is provided via an exchange-traded wrapper can be a major benefit to investors seeking liquidity during various market conditions.

 

We did not see many significant changes to normal bid/ask spreads in WisdomTree Funds on said day, which is attributable to the benefits of the exchange-traded wrapper, but wanted to review the fundamentals of ETF spreads, given the market backdrop. When trading ETFs, it’s best to execute under stable market conditions. However, if investors do need to trade on days like May 13, remember the fundamental factors that go into the spread you see on screen and seek advice from your trading desk or capital markets desk if you have any questions or concerns.  

 

 

Unless otherwise stated, all data is Bloomberg, as of May 14th, 2019.


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ETF Education, ETF Trading


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