(Sharecast News) - Vistry tumbled on Monday following a report that leading credit insurer Allianz Trade is reducing the cover it extends to suppliers of the housebuilder.

According to the Financial Times, which cited people familiar with the matter, the insurer warned suppliers in recent weeks that it is adjusting its credit limits for Vistry, which could result in cover being reduced by up to 70%. One of the sources said that the final level of cover provided will depend on Vistry's financial performance in the weeks ahead.

Suppliers buy credit insurance to protect themselves in case their customers fail to pay for goods and services; when coverage is withdrawn, suppliers to the affected company may demand payment upfront. Credit insurance is often provided by several insurers, and suppliers may still choose to continue trading with Vistry even without cover.

Sources told the FT that the adjustments to credit limits affect new trading agreements with Vistry and do not apply retroactively.

Vistry told the Financial Times: "Credit insurers continue to provide substantial cover for our supply chain which more than meets the group's requirements on an ongoing basis. We are not aware of any supplier withdrawing trade from Vistry due to credit insurance changes and we have seen no interruptions to our supply chain."

Market speculation about Vistry's credit insurance coverage began on Tuesday, when Travis Perkins' financial chief Duncan Cooper said on the company's earnings call that credit insurance had been pulled from a "fairly significant national housebuilder".

Responding to an analyst's question about the industry's travails, Cooper said financial stress could be detected not only among the company's competitors but also "up and down both parts of the supply chain".

"[I] got a phone call on Friday to say . . . your credit insurance, the final element of credit insurance" had "been pulled on a fairly significant national housebuilder . . . so the stress is real," he said.

People familiar with the matter told the FT that Cooper was referring to Vistry.

At 1355 BST, Vistry shares were down 7.9% at 261.20p.

Russ Mould, investment director at AJ Bell, said: "Vistry boss Adam Daniels must be wondering what he has walked into, having taken over the helm a little less than four months ago.

"The business was already suffering thanks to cracks in the foundations of its regeneration and social housing focused model and due to accounting failures in its Southern division. There might now be a new challenge.

"Reports suggest leading credit insurer Allianz Trade is reducing the cover it extends to Vistry's suppliers. Suppliers use credit insurance to protect themselves against the risk customers might fail to pay for goods and services.

"If they can't get cover then suppliers might demand they are paid upfront, which could put further pressure on Vistry's cash flow. Allianz Trade is not the only insurer out there and reportedly these new credit limits only apply to new trading agreements.

"Vistry has responded to say the supply chain continues to be substantially covered by credit insurance and says it has seen no interruptions and is not aware of any supplier withdrawing its trade from the company.

"However, the share price reaction shows investors are concerned and this will only ramp up the pressure on the company to pay down debt as it looks to weather a tricky period for the property market."