The global fixed-income sell-off is taking a toll on government bonds, pressuring mortgage-backed securities and related exchange traded funds.

Mortgage securities-related ETFs are in their third day of selling Wednesday, with the iShares MBS ETF (NYSEArca: MBB) down 0.4%, Vanguard Mortgage-Backed Securities Index ETF (NYSEArca: VMBS) 0.2% lower and SPDR Barclays Mortgage Backed Bond ETF (NYSEArca: MBG) down 0.6%. The MBS ETFs are beginning to test their long-term, 200-day simple moving averages.

MBB has a 3.58 year duration and a 1.37% 30-day SEC yield. VMBS has a 5.8 year duration and a 1.24% 30-day SEC yield. MBG has a 4.44 year duration and a 2.05% 30-day SEC yield.

Brad Scott, a mortgage-bond trader at Royal Bank of Canada’s capital-markets unit, argued that the sell-off is a result of pressures from overseas markets, notably on selling in Eurozone debt, reports Jody Shenn for Bloomberg.

“We are being led down by German bunds and European government bonds,” Scott told Bloomberg.

Scott believed that foreign investors who have been actively acquiring U.S.-dollar denominated debt are now stepping back in light of the recent increase in yields – bond prices and yields have an inverse relationship, so rising yields correspond with falling bond prices.

The fixed-income market was upended Wednesday after European Central Bank raised its inflation forecast and President Mario Draghi warned of heightened volatility ahead, reports Daniel Grote for Citywire.

Yields on Fannie Mae securities inched up 0.11 percentage points to 3.08% in mid-day Wednesday, touching their highest level since Oct. 7. In contrast, the mortgage-bond yields traded at a low of 2.43% in January but are still below the 3.15% five-year average.

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