The Turkish lira fell to a record low ahead of the renewed rate cut expected this week.
Its price fell on Monday to as much as 14.99 against the US dollar, after being at 14.10 on Friday.
The currency has already lost around 47 percent of its value this year.
The central bank had intervened in the foreign exchange market three times in the past two weeks and sold dollars from its reserves in order to stabilize the lira.
The reason for the downward trend is the monetary policy of the central bank, which lowered its interest rates despite high inflation.
For this Friday, economists surveyed by the Reuters news agency expect the interest rate to be lowered again - from currently 15.0 to 14.0 percent.
And this despite the fact that the inflation rate is currently more than 21 percent.
The central bank has rapidly lost its reputation among investors.
President Recep Tayyip Erdogan contributed to this.
A few days ago, he also replaced Finance Minister Lütfi Elvan with his previous deputy, Nureddin Nebati, after only around a year in office.
He immediately defended Erdogan's controversial monetary policy stance.
“Interest is an evil that makes the rich richer and the poor poorer,” the president had recently said.
Economists, on the other hand, believe that interest rates must rise in view of high inflation.
Then the currency would become more attractive for investors again.
According to Fitch, the US rating agency S&P recently lowered the credit rating outlook for Turkey to “negative” from “stable”.
The rating of the creditworthiness will initially remain at "B +" and thus in the speculative range, announced the creditworthiness watch on Friday. The reason for the step is, among other things, the high inflation and the currency crisis in the country.