The Bank of England will begin a 10 billion-pound ($13 billion) corporate-bond buying program on Sept. 27 as it seeks to bolster the U.K. economy.

The central bank will hold reverse auctions to buy notes on Tuesdays, Wednesdays and Fridays, it said in a statement detailing plans first announced last month. The 18-month program will cover sterling bonds from investment-grade non-financial issuers based in the U.K. or with sizable operations in the country.

BOE Governor Mark Carney introduced stimulus measures and cut interest rates to a record-low 0.25 percent to help ease the economic shock of the U.K.’s June vote to leave the European Union. Corporate-bond purchases will include debt from companies such as Apple Inc., BMW AG and power generator SSE Plc, the BOE said.

“The market has already come a long way,” said Gordon Shannon, a London-based money manager at TwentyFour Asset Management, which oversees 7 billion pounds. The central bank has “given themselves maximum flexibility” in drawing up the eligibility criteria, he said.

Bonds with a face value of about 110 billion pounds will be eligible for the program, the central bank said in a separate statement. The notes have a market value of 150 billion pounds, it said. Sterling debt from overseas companies can be purchased if the issuer employs hundreds of people in the U.K. and generates annual sales of at least 20 million pounds locally, it said.

The central bank has divided notes in the program into nine industries, and it intends to make purchases in line with each sector’s share of the eligible debt market. Electricity has the largest share at 25 percent, followed by non-cyclical consumer companies at 15 percent.

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