Major credit ratings agencies this week downgraded China’s most indebted property developer Evergrande, as concerns over Asia’s junk bond sector rise. 

Fitch Ratings on Wednesday downgraded China Evergrande one notch from B to CCC, saying that the negative developments surrounding Evergrande may weaken investor confidence, further pressuring its liquidity. 

A rating of CCC means there’s a “real possibility” of a default, from the previous B rating — which means there is material default risk, but a limited margin of safety remains.

S&P Global Ratings on Monday took the property developer down two notches, from B+ to B-, citing its inability to reduce debt “in an orderly manner.” It added that the firm’s credit rating was dragged down by what S&P believed to be a “severe” decline in profitability at the firm.

China Evergrande has been struggling with liquidity issues since last year. However, last week’s news of an asset freeze refocused attention on the company’s debt troubles. That brought its share price down to a four-year low. Year-to-date, Evergrande’s share price has tumbled more than 60%.

While China’s technology crackdown has triggered shockwaves through stock markets this week, it’s actually real estate that’s sparking concerns in Asia’s credit markets, BlackRock told CNBC on Thursday.

“Tech is a smaller part of the credit markets in Asia,” Neeraj Seth, head of Asian credit at BlackRock told CNBC’s “Squawk Box Asia.” “One of the key sectors that has gotten impacted in the credit markets is actually real estate.”

Asian bond markets have underperformed in the last few months, compared to those markets in the U.S. and Europe, he said. 

In fact, Asian high-yield credit markets — also known as junk bonds — are in the middle of a correction, Seth pointed out.

China’s property developers are among the biggest junk bond issuers in Asia. Junk bonds are non-investment grade debt that carry a high default risk, and therefore, usually come with higher interest rates to compensate for that risk.

Chinese authorities in recent months have attempted to cool the country’s hot property market with new restrictions, particularly lending to real estate businesses.

“I think interestingly, we are in the middle of a correction,” Seth said, referring to Asian high-yield bond markets. “So that obviously warrants some level of caution — at this point we’re in the summer months with lower liquidity, so expect a bit more noise in front of us.”

“It’s very unnerving when you are in the midst of (a correction). But if you are able to actually systematically look through the noise and pick the names you like — have a diversified portfolio, build resilience in the portfolio,” Seth said.

He said investors have been rewarded by taking those positions in volatile times. “I think we are in one more of those volatile periods where it will pay investors to actually be patient here and build some positions.”

— CNBC’s Evelyn Cheng contributed to this report.