Turkey's benchmark stock index ended the week down 0.47% to close at 86,796.06 points on Friday.
After starting the last business day of the week at 86,944.89 points, Borsa Istanbul's BIST 100 index fell 407.79 points from 87,203.85 points at Thursday's close.
On a weekly basis the benchmark index posted a 1.96% decline. At the beginning of this year, the BIST 100 stood around 89,000 points.
During Friday's trading, the BIST 100 hovered between 86,551.69 points and 87,518.58 points -- 32 stocks on the index rose, 56 fell, and 12 were flat compared to the previous close.
Closing the day with a market value of nearly 575 billion Turkish liras ($96 billion), the benchmark index posted a daily trading volume of 5.44 billion Turkish liras ($898 million).
By market capitalization, Turkish conglomerate Koc Holding ($6.35 billion), private lenders Garanti BBVA ($5.31 billion) and Akbank ($4.97) were the leading companies of BIST 100.
Shares of Garanti BBVA, national flag carrier Turkish Airlines, and defense company Aselsan recorded the highest trading volumes on Friday -- accounting for around 35% of the benchmark index's total trade volume.
Shares of conglomerate Ittifak Holding performed the best, rising 8.46%, and stocks of real estate investment trust Ihlas Gayrimenkul were the worst, down 6.45%.
One ounce of gold was sold for $1,294.30 at the daily close in Borsa Istanbul's Precious Metals and Diamond Markets, versus $1,286.30 at the previous close.
The price of Brent oil was $72.47 per barrel as of 6.30 p.m. local time (1530GMT) on Friday -- with a day range of $72.17 to $73.23.
At the beginning of 2019, a barrel of Brent oil was sold for around $53.
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