Brazil’s central bank announced on Tuesday it would not extend its currency swap auction programme.

Officials will stop the U.S. dollar swap auctions at the end of this month, but the bank will continue rolling over old contracts.

Swaps act as financial derivative products that offer protection against foreign exchange (forex) losses.

The bank’s decision came as the Brazilian currency, the real, is at the lowest levels against the U.S. dollar in a decade.

The central bank said it would sell U.S. dollars with repurchase agreements if it needed to boost liquidity in the forex market. It added that if deemed necessary it could also use “additional foreign exchange instruments at its disposal” to stabilise the exchange rate.