U.S. Treasury yields jumped on Tuesday after a higher-than-expected core inflation reading and reports of progress in U.S.-China trade negotiations sapped demand for safe assets like bonds.

How are Treasurys doing?

The 10-year Treasury note yield TMUBMUSD10Y, +2.33%  rose 4 basis points to 1.680%, while the 2-year note rate TMUBMUSD02Y, +5.10% surged 8.5 basis points to 1.665%. The 30-year bond yield TMUBMUSD30Y, +0.49%  was up around a single basis point to 2.139% Debt prices move in the opposite direction of yields.

A widely-watched gauge of the yield curve’s slope, the spread between the 2-year Treasury note yield and the 10-year note yield narrowed to 2 basis points, its flattest level since 2007. A flatter yield curve can indicate investor worries that monetary policy remains too tight.

See: The 30-year Treasury bond yield is on the brink of falling to an all-time low

What’s driving Treasurys?

The United States Trade Representative announced it would winnow down the list of goods that are set to incur a 10% tariff on additional $300 billion of Chinese imports publicized earlier in August 1. A USTR spokesman said U.S. Trade Representative Robert Lighthizer and Treasury Secretary Steven Mnuchin had talked with Chinese Vice Premier Liu He over the phone.

“Certain products are being removed from the tariff list based on health, safety, national security and other factors and will not face additional tariffs of 10 percent,” according to the statement. “Further, as part of USTR’s public comment and review process, it was determined that the tariff should be delayed to December 15 for certain articles.”

However, protests in the Asian financial center of Hong Kong showed few signs of ending, prolonging the need for safe haven bonds. Police clashed with demonstrators in Hong Kong International Airport as departing flights were cancelled for a second day in a row.

See: Protesters clog Hong Kong airport again after it reopens

Investor confidence in Argentina was also shaken after business-friendly Mauricio Macri President was defeated by populist Alberto Fernández in primary elections on Monday, suggesting a similar outcome in October’s presidential vote. On Monday, the Argentinian peso USDARS, +4.9344%   swooned 15% against the U.S. dollar and its stock market SPMERVAL, +5.27%   saw a 31% drop.

Read: How Hong Kong clashes could wallop the U.S. stock market

In economic data, the U.S. consumer price index for July increased by 0.3%. Its core gauge stripping out for energy and food prices also rose by 0.3%, pushing its yearly growth up to 2.2%. Analysts polled by MarketWatch had forecast core inflation to rise by 0.2%.

Stronger inflationary pressures can weigh on the value of a bond’s fixed-income payments.

Check out: Higher gasoline prices, rent boost cost of living in July, CPI shows, but inflation still mild

What did market participants’ say?

“There’s no real change in view from us. We don’t think you’re going to see a trade deal in the short-term horizon, we’ve seen various constructive comments here and there before,” said Scott Kimball, fixed-income portfolio manager at BMO Global Asset Management.

“The global economy is slowing and making the domestic economy the best game in town. So we expect inflation to be stronger than the current expectations that appear to be caused by overly pessimistic expectations for the U.S. economy,” wrote Bryce Doty, portfolio manager for Sit Fixed Income.