Base Price, Price Bands

“Base price” is the price which constitutes a base for determining the upper and lower price limits of an equity between which it can be traded during a day. “Base price” is calculated by rounding the "closing price” of the previous day to the nearest price tick. "Price tick" is the smallest price variation that may occur once at a time for each equity.

If there is no base price (i.e. where there is no previous closing price or margins are set free):

• Matching price determined after order collection period in which the first price is established for the stocks traded with single price trading method, shall be used as the base price.
• For the stocks traded with continuous trading method, the base price will be the price of the first trade. (If any price is established in opening session then that price, and if not established, the price of the first trade to be realized at continuous trading period shall be taken as the base price).
• For the preemptive rights, no base price shall be used on the first day till the day when a price is set, and the closing price of the first trading day shall be used as the base price for the next day. (as it is currently)

Besides, if no trade is made within the day on a stock having a base price from the previous day, same base price will continue to be used as the base price for the next day (as it is currently).

No base price shall be applied for warrants and certificates.

Price margin and price limits

The margins to be applied on the base prices of a securities (i.e. closing price of a the previous day) in order to determine the price limits for a day are given below (free margin may be applied at the  certain equities and ETFs where necessary):

• Securities traded in BIST Stars Market Group 1/2 and BIST Main Market Group 1 are traded in a margin of ±20%,
• BIST Main Market Group 2 securities are traded with 15%,
• Watchlist Market /Equity Market For Qualified Investors/Pre-Market Trading Platform securities are traded with ±10% margin.
• One exception as a share is ISKUR.E which is traded with ±50% margin. 
• Exchange Traded Funds are traded with ±20 margin.
• Preemptive Rights are traded with ±50% margin.
• Real Estate Certificates, Participation Certificates of Venture Capital Investment Funds and shares of Real Estate Investment Funds are traded with ±20% margin.
• Free margin for warrants and certificates. 

In calculation of price limits, rounding process will be made inwards. The rounding to the nearest upper tick in finding upper price limit in the existing application shall be made to the nearest lower tick in the system as the rounding to the nearest lower tick in finding lower price limit shall be made to the nearest upper tick.

The price limits applied in the closing session are applied as ± 3% on the last transaction price before the closing session.

Price Ticks

• The price ticks and price ranges defined in the following Table 1 and Table 2 shall be used for the stocks, preemptive rights and ETFs traded on the EM,
• 1 kurush price tick application shall continue to be applied on all price ranges for warrants, certificates and wholesale trading.
• The display of prices on the new system will be up to 10 bps sensitivity.

Table-1: Price ticks to be applied in the stocks and preemptive rights

Table-2: Price ticks to be applied in the Exchange Traded Fund units