The cost of hedging USD assets has however risen due to a flattening USD yield curve and dislocations in FX forwards. As shown below, their effective yield on a 10 year US Treasury (UST) hedged with a 3 month USDJPY FX forward has fallen to 0.17%. As this is below the roughly 1% yield many financial institutions require to generate profits they have been selling USTs, even as unhedged 10 year UST yields rise. The effective yield will fall dramatically for here if 3 month USD Libor rises in line with the Fed’s “Dot Plot” forecast for short term rates, assuming other variables like 10 year UST yields remain constant.
https://www.zerohedge.com/news/2018-07-01/tsunami-out-us-clos
