Turkish BIST 100 Index Swings Amid NATO Summit Expectations

The BIST 100 index showed marked volatility in early July 2026. On 7 July the index opened down 16.63 points at 14,407.91, then fell further before closing at 14,497.37, a 0.50 % gain. The following day the index opened up 31.46 points to 14,382.06, a 0.22 % rise, and later sessions recorded modest gains around the 14,400‑14,500 level. Trading volume hovered near 200 billion TL.

Market participants linked the movements to the NATO summit in Ankara. Analysts said the summit’s diplomatic messages could lower Turkey’s risk premium and boost foreign investment. Defense stocks such as ASELSAN rallied, while banking and holding sectors posted mixed results. One commentator noted, “The BIST 100’s performance is being shaped by NATO‑related expectations rather than domestic fundamentals.”

In a related development, Turkish President Recep Tayyip Erdoğan told reporters at the summit, “The F‑35 issue is not new for us; we have already secured five aircraft,” and U.S. President Donald Trump replied, “Turkey has become a very strong military country under your leadership.” These remarks underscored the geopolitical backdrop influencing investor sentiment.