IDE President Dvash said in a letter to bourse members that he wanted to personally update them on the credit situation.
He said the IDE was getting ready to fight the decision by the bank. He said the resources, assets, exports, local sales and the bourse's reputation had always enough to ensure that IDE members could attract credit.
He said that the diamond exchange could not accept a unilateral change of policy and that the bank would suddenly start asking for collateral to secure loans that were different from what was requested from other industries.
"The Bank HeBenleumi has changed its policy, and even worse from our point of view is that the pressure for this came from the Supervisor of Banks unit at the Bank of Israel.
"The IDE has created a professional committee to fight the decision and senior offices have been walking the corridors of the Knesset (parliament) and the government in order to create a strong political lobby that will fight in our favor.
"As a result, we have been invited to meetings with the Supervisor of Banks and the Bank of Israel Governor and I held a personal meeting with the CEO of the Bank HeBenleumi , Smadar Barber Tzadik.
"Our stand is that it is not possible for a unilateral decision to be passed without a battle.
"All bank CEOs and regulators everywhere will know that diamantaires are a vital part of Israeli industry and for the country's banks. Our business is stable and good, and no backward attitudes or agenda will create a bad situation for us.
"We face a challenging period and I am not sure we will succeed in absolutely everything, but I promise there is no stone that we will not turn over, or Knesset member or minister or journalist that we won't meet in order that they will know about our fight which is right.
"When we return from the summer holiday, we are preparing to hold an emergency summit to which we will invite our partners from the business sector, public figures and Knesset members. We will present the latest information about the sector and explain our position on the issue.
"We have also requested from the Knesset Finance Committee to hold an emergency meeting on the issue and I am sure our request will be approved. We must all understand that giving in is not an option. We will succeed together," Dvash wrote.