By Min Zeng

Some corners of the bond market faltered on Monday as some traders and investors pared exposure to positions closely associated with Bill Gross before his abrupt departure from Pacific Investment Management Co. last week.

Prices on some U.S. inflation-indexed Treasury bonds fell for the second day on Monday. The bout of selling has sent the yield on Treasury inflation-protected securities to 0.82% on Monday from 0.764% on Thursday, according to Tradeweb. Yields rise as prices fall.

Yields on the sovereign debt of so-called peripheral eurozone nations, or those countries that recently have struggled with a dim outlook for economic growth, rose slightly on Monday. The yield on Spanish 10-year debt rose by 0.03 percentage point to 2.227%, while the yield on Italian bonds rose by 0.02 percentage point to 2.41%. Meanwhile, yields fell on bonds issued by more financially stable countries such as Germany.

Mr. Gross said earlier this year TIPS are valuable to hedge against higher U.S. inflation in the longer term, while the European Central Bank's bold steps in printing money to support the economy bolstered the value of government bonds in the eurozone.

"The Pimco effect is going to play out over time, which means we could see a lot of volatility is certain sectors" of the bond market, said Kevin Giddis, head of fixed income at Raymond James in Memphis, Tenn.

Traders said more fundamental reasons were moving markets as well on Monday. Unrest in Hong Kong revived global-growth worries, helping to spur a selloff of riskier assets worldwide.

The broader $12 trillion Treasury market, which weakened on Friday in part due to the news about Mr. Gross, rallied on Monday.

"The Treasury bond market is very large and beyond some short-term potential market disruption related to Gross' departure," said James Sarni, senior managing partner at Payden & Rygel in Los Angeles, which manages about $85 billion. "I am confident that the bond market will move beyond this news as it has so many other noteworthy events."

Investors and traders say the Pimco factor will be most pronounced on the value and trading of the markets that are relatively less liquid.

"What's being impacted are the less-liquid asset classes, such as credit, foreign sovereigns, and emerging-market debt, under the theory that, if Pimco sees redemption and needs to sell these positions, they'll have to do so at a discount to current levels to get the bonds sold," said Guy Lebas, chief fixed-income strategist at Janney Montgomery Scott, which has $58 billion in assets under management.

Write to Min Zeng at min.zeng@wsj.com