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Does technical analysis work for municipal bonds?

David Waring

(June 2012) Technical analysis is using market price data, usually displayed in a chart, to try and predict future price movements. To predict future price movements, there are two central tenets:

  • Inertia – You will often hear technical analysts say things like “Don’t fight the trend” and “Don’t Try to catch a falling knife” which capture the spirit of the inertia tenant.  Basically, you want to be long when the market is rising and short or flat when the market is falling.
  • Reversion To Mean – Markets tend to overshoot the “real” value of a security during any strong directional move up or down. As a rally or sell-off loses steam,  saner heads prevail. This usually leads to a more rational assessment of value and creates a move in the opposite direction.

 

There are Several Problems with Technical Analysis For Municipal Bonds

  • Not Enough Data – To know the trend, you need to know the price history. Most municipal bond issues trade relatively infrequently which means that price data for them can be difficult to interpret . This problem can be solved by looking at groups of bonds of a similar type and combining the price data.
  • Interest Rate Changes Can Overwhelm Relative Price Movements – The primary driver of all  bond prices, including municipal bonds, is the overall interest rate environment. Without adjusting for interest rates, detecting meaningful trends in market data is very difficult.  To do detailed market analysis municipal bond market professionals talk about  a spread against a yield curve of AAA General Obligation (GO) State Bonds. When a bond has a spread of +100 bps its  yield is  1.0% (100 bps) more than the average AAA yield for its maturity. This allows market participants to discuss relative changes of value between different types of municipal bonds.

 

Do Hospital Bonds Look Overbought?

Daniel Berger, a senior market strategist for Thomson Reuter’s Municipal Market Data (MMD), issued a report on May 11, 2012, “The Lower Spreads For Hospital Bonds Might Make You Sick”. He argues that hospital bonds currently look expensive; the spread over the AAA yield curve is too small, by historical measures. (All numbers are as the date of this report)

  • 10 Yr “A Rated” Hospital Bonds Are Trading Around +127bps more than  MMD’s AAA (GO) Yield Curve
  • The average has been +156bps for the last 12 months (+166bps since the collapse of Lehman Brothers.)
  • The current level is at or close to a low for the last 12 months.

If hospital bonds revert back to their average level for the last 12 months, the spread could rise by 30 bps. While the report clearly indicates that hospital bonds look oversold compared to historical averages, it does not clearly establish the  technical downward trend  is over. A classically trained technical analyst would want confirmation that the downtrend was over from the following data:

  • The price bouncing off a bottom price “support level” several times over a period of time.
  • Some previous high or low being crossed as the price rises (in this case the recent high of 140 bps hit in the middle of April might be a positive signal).
  • Decrease in trading volume on days when the price falls. Increases in volume on days when the price rises. (this would be difficult to determine for only hospital bonds)

Please note:Berger stated that since this report was written this spread has steadily increased and closed on June 8th at +137bps.

Whats the Bottom Line?

If you find value in technical analysis when analyzing other markets then you can use it in a broad sense in the municipal bond market as well.  However, as outlined above, the lack of consistent price data makes it less of an exact science as it would be for other markets.
As for hospital bonds while they may be overvalued at this stage, in my opinion, it does not look like they are by enough to make this an interesting trade for the individual investor.

For more on municipal bonds visit the municipal bond section of learn bonds.

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David Waring

David Waring

David Waring was the founder of LearnBonds.com and has been a major contributor to the extensive library of investing news and information available on the site. Until the launch of Learnbonds.com in late 2011 there was no single site on the internet catering exclusively to the individual bond investor. This was true even though more individuals own stocks than bonds. Learn Bonds was launched to fill that gap.