Foreign investors are buying up Chinese debt again, thanks to a strong yuan and falling bond yields.

Overseas funds added 82.7 billion yuan ($12 billion) to their onshore bond portfolios by the end of 2018 for a total of 1.5 trillion yuan, Bloomberg reported, citing data from the China Central Depository & Clearing Co. The December increase was the second-highest since data became available in 2014, according to Bloomberg.

The increase in Chinese debt holdings among foreign investors was also the most since June, reversing November’s net selling trend, according to the report.

The about-face was attributed to a rise in the yuan’s value, riding on hopes of a possible trade deal with the U.S., as well as lower hedging costs and a rally in bonds. China was one of the world’s best-performing government bond markets in 2018 as the government eased monetary policy and investors shunned the sluggish stock market, according to Bloomberg. The report predicted further gains this year.