BIST 100's Most Dramatic Winners and Losers: A Sector‑Specific Deep Dive

The BIST 100's morning session turbulence is reshaping investor portfolio directions.

BIST 100 Daily Heat Map

■ASELSAN (ASELS) +%8.4 – Buying pressure after defense contract approval.

■BİM (BIMAS) +%7.2 – Strong demand in discount retail.

■TOFAŞ (TOASO) +%6.9 – Positive impact from new model launch.

■VakıfBank (VAKBN) -%5.8 – Net loss announcement and rising credit risk premium.

■Ereğli Demir ve Çelik (EREGL) -%5.2 – Declining steel prices and weak external demand.

■Turkish Airlines (THYAO) -%4.9 – Higher fuel costs and passenger capacity uncertainty.

Sector Powerhouses: The Engines of Gains

■Defense & Aerospace: ASELSAN and HAVELSAN (HAVLS) together delivered a %12 sector surge.

■Retail: BİM and ŞOK Marketler (SOKM) generated a combined %10 volume increase.

■Automotive: TOFAŞ and Ford Otosan (FROTO) posted a joint %9 performance boost.

Dark Shadows of Decline

■Banking: VakıfBank and İş Bankası (ISCTR) together suffered a %7 sector pullback.

■Steel & Mining: EREGL and Kardemir (KRDMD) together lost %6.5 in value.

■Transportation: THYAO and Pegasus (PGSUS) combined for a %5.8 drop.

Smart Money Flow & Dark Pool Signals

■Dark Pool Volume: Rose %3.2 during the day, concentrating on ASELS and BİM stocks.

■Institutional Buying: Tera Yatırım and Yapı Kredi Yatırım posted a net +%4.6 accumulation, heavily weighted toward defense and retail sectors.

■Arbitrage Opportunities: A %0.8 spread between Borsa Istanbul and NYSE created short‑term buy‑sell chances in high‑liquidity stocks like ASELS.

Volkan Şen – The majority of the day’s top gainers and losers are steered by smart‑money moves through dark‑pool channels. Rising liquidity in defense and retail is amplifying net‑buy signals from institutions such as Tera Yatırım and Yapı Kredi Yatırım. ASELS’s %8.4 surge stems from both contract approval and institutional buying, presenting a clear buy‑the‑dip opportunity for momentum traders. Conversely, the declines in VakıfBank and EREGL reflect net‑selling pressure alongside external macro factors (credit risk premium, commodity prices). Monitoring dark‑pool data and net institutional flows will provide a decisive edge in risk‑adjusted portfolio construction.