Here's this week's update for the exchange-traded funds that track U.S. Treasury bonds, gold bullion, utility stocks and junk bonds -- the "flight to safety" investment choices.

The yield on the 30-year U.S. bond stayed below its pre-Brexit vote high of 2.563%, set on June 23. This yield has been below its 200-day simple moving average since Jan. 12 when the average was 2.927%. Most on Wall Street did not expect yields to fall in 2016, but indeed they have. The 200-day simple moving average is now 2.560% with the 50-day simple moving average of 2.298%. This week's value level is 2.468% with my annual pivot at 2.265%.

Investors can trade the U.S. Treasury 30-Year Bond like a stock using the 20+ Year Treasury Bond ETF (TLT) - Get Report , which is an exchange-traded fund backed by a basket of U.S. Treasury bonds with maturities of 20 to 30 years. As a stock-type investment it never matures and interest income is converted to periodic dividend payments.

Comex gold futures set its second half 2016 high of $1,377.5 on July 6 then traded as low as $1,305.5 on Sept. 1. This range remains in play with this week's value level of $1,315.2.

Investors can trade gold like a stock using the SPDR Gold Shares ETF (GLD) - Get Report , which is backed by gold bullion.

The Dow utility average set its all-time intraday high of 723.83 on July 6, then traded as low as 655.98 on Sept. 9 setting the trading range. The utility average is back above its 50-day simple moving average of 688.22 and is well above its 200-day simple moving average of 651.99. My quarterly and semiannual pivots remain in play at 660.24 and 670.81, respectively, as utilities stabilize. Buying within this range has proven to be a prudent investment strategy.

Investors seeking the safety of dividends can trade the Utilities Select Sector SPDR Fund (XLU) - Get Report , which is a basket of 28 utility stocks.

Investors betting that junk bond yields will tighten against U.S. Treasuries should consider the SPDR Barclays High Yield Bond ETF (JNK) - Get Report . Keep in mind that the performance of junk bonds correlates to the stock market, not to the bond market. This ETF set its 2016 high of $36.76 on Aug. 29 and a re-test is feasible with the ETF above its 50-day simple moving average of $36.31.

The year-to-date gain for S&P 500 SPDR ETF (SPY) - Get Report rose to 5.9% last week. The U.S. Treasury bond ETF, the gold ETF and the utility stocks ETF still outperform with year-to-date gains of 13.5%, 25.8% and 17.7%, respectively, up from 11.8%, 23.3% and 13.8% a week ago.

Here's the weekly chart for the bond ETF.

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Courtesy of MetaStock Xenith

The weekly chart has been negative since the week of Sept. 9. The bond ETF is below its key weekly moving average of $137.19 and well above its 200-day simple moving average of $119.82. The weekly momentum reading ended last week at 43.58 down from 51.72 on Sept. 16.

Investors looking to buy the bond ETF should continue to do so on weakness to $132.45, which is a key level on technical charts until the end of 2016.

Investors looking to reduce holdings should consider doing so on strength to $140.45, which is a key level on technical charts until the end of September.

Here's the weekly chart for the gold ETF.

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Courtesy of MetaStock Xenith

The weekly chart was negative a week ago, but is now neutral. The gold bullion ETF ended last week back above its key weekly moving average of $126.60 and has been above its 200-week simple moving average of $123.57 since the week of July 1. The weekly momentum reading ended last week at 52.74 down from 59.94 on Sept. 2016.

Investors looking to buy the gold EFT should do so on weakness to $101.90, which is a key level on technical charts until the end of September. Investors looking to reduce holdings should consider doing so on strength to $140.31, which is a key level on technical charts until the end of September.

Economist and columnist Roger Arnold of Real Money, TheStreet's premium site for active traders, likes gold here.

"An increasing number of analysts are calling for something other than slow and steady growth," Arnold wrote in an analysis today. "Regardless of whether that's deflation, stagflation or inflation, we should listen to them. The most logical asset class that should perform well in all of those circumstances is gold." Click here to read more.

Here's the weekly chart for the utilities ETF.

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Courtesy of MetaStock Xenith

The weekly chart for utilities has been negative since the week of Aug. 12. That changed last week when the utilities ETF ended the week above its key weekly moving average of $50.11. This ETF continues to well above its 200-week simple moving average of $42.77. The weekly momentum reading ended last week at 25.32 virtually unchanged from 25.57 on Sept. 16.

Investors looking to buy the utilities ETF should do so on weakness to $48.26, which is a key level on technical charts until the end of September, and almost tested two weeks ago. My key level of $50.05 should be a magnet until the end of 2016, as it was last week.

Investors looking to reduce holdings should consider selling strength to $54.93, which is a key level on technical charts until the end of September.

Here's the weekly chart for the junk bond ETF.

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Courtesy of MetaStock Xenith

The weekly chart for the junk bond ETF returns to being positive but overbought with the ETF above its key weekly moving average of $36.27 and still well below its 200-week simple moving average of $38.74. This ETF has been below its 200-week SMA since the week of Nov. 14, 2014 as the junk bond bubble was popping. Back then the 200-week SMA was $40.16. The weekly momentum reading ended last week at 83.48 slipping from 86.99 on July 16, from 90.40 on Sept. 8 and from 92.17 on Sept. 2.

Investors looking to buy the junk bond EFT should do so on weakness to $31.97 which is a key level on technical charts until the end of September. A key monthly level remains $36.37.

Investors looking to reduce holdings should do so on strength to $37.17 which is a key level on technical charts until the end of 2016.

This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.