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Focus shifts to interest rate decision in Türkiye’s markets

Photo illustration shows the Istanbul Finance Center alongside Central Bank of the Republic of Türkiye (CBRT) Governor Fatih Karahan. (Collage by Türkiye Today/Mehmet Akbas)
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Photo illustration shows the Istanbul Finance Center alongside Central Bank of the Republic of Türkiye (CBRT) Governor Fatih Karahan. (Collage by Türkiye Today/Mehmet Akbas)
October 20, 2025 02:43 PM GMT+03:00

The interest rate decision of the Central Bank of the Republic of Türkiye (CBRT), which is being closely followed by the markets in Türkiye, stands out as the most important agenda item of this week.

At its September meeting, the policy rate had been lowered to 40.50%. When we recall the latest developments before the decision on Friday, Oct. 23:

  • CBRT Governor Fatih Karahan emphasized this week at an investor meeting in Washington, D.C., that the downward trend in inflation has recently slowed somewhat, that the bank remains determined to ensure price stability, and that it will not abandon its tight monetary policy stance.
  • The CBRT’s October Market Participants Survey was released last week, and the year-end forecast by participants for the Consumer Price Index rose from 29.86% to 31.77%.
  • In the survey, the estimate that monthly inflation in October could be 2.34% also came to the fore.

These developments brought about the predominance of expectations in the market that interest-rate cuts may continue with “more limited steps.”

Banking stocks weigh on Borsa Istanbul

For the stock markets, and especially for the driving force banking sector, this expectation stands out as a “pressure factor.”

The Borsa Istanbul BIST 100 index also lost 4.77% in value last week, closing at 10,208 points. During the week, the index tested a low of 10,053 and a high of 10,683 points.

In the market, the reaction coming from levels close to the critical 10,000 support is regarded as “positive.”

However, it is also emphasized that for this reaction to gain significance, it is important that 10,000 continues to hold, that the 10,280 intermediate resistances be exceeded, and that the index rise above 10,550, where the 100-day average is approaching.

Candlestick chart shows Borsa Istanbul’s benchmark BIST 100 index movements year-to-date in 2025.
(Chart via TradingView)
Candlestick chart shows Borsa Istanbul’s benchmark BIST 100 index movements year-to-date in 2025. (Chart via TradingView)

Markets watch CHP ruling and inflation as year-end drivers

Another important agenda item of this week is also the CHP congress lawsuit to be held on Friday, Oct. 24. The annulment or postponement of the lawsuit is shown by the market as scenarios that would be received positively.

As a result, on the economic side, the continuation of the disinflation process may once again come to the fore as a catalyst in the stock exchange during the last quarter of the year.

In this sense, the inflation data to be announced in the coming months have become more important. On the political side, the elimination of uncertainty also seems likely to support the dissipation of the fog clouds in front of the markets.

October 20, 2025 02:43 PM GMT+03:00
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