Borsa Istanbul’s “Halkbank” Spring: Turkish Assets Surge as Global Risks Recede

Borsa Istanbul has navigated one of the most critical turning points of 2026 with a historic rally. The BIST 100 index closed the day with a massive 3.73% gain, finishing at 13,175.74 points, providing investors with a significant sigh of relief. With total trading volume hitting 178 billion TL, the primary driver of this bull market was not just global risk appetite, but the resolution of a decade-long burden: the Halkbank case.

The Halkbank and Trump Effect: Is the “Sword of Damocles” Finally Lifted?

The day’s most strategic development was Halkbank’s announcement that it had decided to sign a “Deferred Prosecution Agreement” (DPA) with the U.S. Department of Justice regarding the criminal case ongoing since 2019. This case, which has long cast a shadow over the Turkish banking system, has moved toward a settlement following the return of the Trump-Erdogan rapport.

Economist Atilla Yeşilada defines this development as a “milestone.” According to Yeşilada, the risk of a potential penalty—estimated between $9 billion and $20 billion—has been completely neutralized. However, the danger was greater than just the fine; the risk of secondary lawsuits against other private banks and the potential exclusion of the Turkish financial system from the global SWIFT network has been relegated to the pages of history. This explains why the banking index exhibited an aggressive 4.63% rise.

Experts Weigh In: Will the Sell-Off in Borsa Istanbul Continue?

Geopolitical Shift: The S-400, F-35, and KAAN Triangle

Closing the Halkbank file could trigger a geopolitical chain reaction. Signals that the U.S. may align more closely with Ankara’s expectations regarding Northern Syria (AANES) suggest that President Erdogan’s confidence in the Trump administration is yielding results.

This new “architecture of trust” may soften Turkey’s rigid stance on Russian-made S-400 air defense systems. Analysts suggest that transferring these systems to a third-party ally (such as Azerbaijan or Qatar) could be the golden key to lifting CAATSA sanctions. Lifting these sanctions would significantly accelerate the mass production of Turkey’s fifth-generation fighter jet, KAAN, by securing American engine and spare part supplies.

Furthermore, unsuccessful Iranian missile attacks allegedly targeting Incirlik Air Base have strengthened the “ally against a common enemy” perception in the U.S. Congress, potentially fostering bipartisan sympathy for Turkey.

“Trump Peace” Winds in the Oil Market

On the global front, President Donald Trump’s statements that the war with Iran “will end very soon” triggered a rapid retreat in oil prices. Brent crude’s dip below the $100 mark is a boon for energy-importing nations like Turkey, signaling a narrowing current account deficit and cooling inflation expectations. The mining sector emerged as the day’s champion with a 7.43% gain, reflecting this new balance in commodity prices.

AI (AİDA) Warning: The End of Passive Investment

Despite the market euphoria, ParaAnaliz’s AI module AİDA and AkanakLabs models urge investors to be selective. With the Central Bank (TCMB) maintaining overnight rates in the 40% band, credit channels remain frozen. This environment could push domestic-oriented sectors like retail and construction into a “Fatal Solvency Zone.”

According to AI analysis, instead of buying into every rising stock, investors should focus on “Geopolitical Alpha” and “Nominal Fortresses”:

• ASELSAN (ASELS): Supported by state defense budgets and export potential, it remains the strongest fortress on the AI radar. Target price: 352 TL.

• TEKFEN (TKFEN) & ÇİMSA (CIMSA): “Currency Proxies” that can grow despite frozen credit markets thanks to strong Euro/USD-based revenues.

ANALYSIS: How Rising Oil Prices Could Impact Inflation in Türkiye

Eyes on the Central Bank: Hold or Cut?

The positive market sentiment has made the upcoming Monetary Policy Committee (MPC) meeting on Thursday even more critical. While the general expectation is for a “Hold,” the drop in oil prices strengthens the TCMB’s hand. Experts whisper that if the oil decline persists through Wednesday, the bank might deliver a symbolic 50-basis-point cut as a “moral boost” to the market.

Technical Outlook and CDS Tracking

Turkey’s 5-year Credit Default Swap (CDS) plunged below 260 basis points following signs of geopolitical easing, reaching its lowest level in months. Technically, the BIST 100 faces strong resistance at 13,300 and 13,400. On the downside, 13,100 and 13,000 remain the primary psychological and technical support levels.

Conclusion: Borsa Istanbul has shed a massive psychological burden with the unravelling of the Halkbank knot. However, with high interest rates and global uncertainties persisting, following the “Smart Money” into the right stocks remains more important than ever.