Deep Analysis

1. Market Summary and Overview

On October 21, 2026, Wednesday, at 21:11, the BIST 30 (XU030) index stands at 14.463.64, declining 1.45% from the previous close of 14.676.53, while BIST 100 (XU100) falls 1.87% to 11.577.12 points, and USD/TRY trades at 49.59 with a slight 0.05% increase, the index's dollar-based performance showing a 1.50% decline. Intraday selling pressure has broadened significantly; technical screening data classifies 27 of 30 stocks with a general signal of 'SELL' or 'STRONG SELL', with only Yapı Kredi and TAV Havalimanları generating a 'BUY' signal. Among the banking index's heavyweights, Yapı Kredi stands out with its short- and medium-term 'BUY' signal, Garanti BBVA remains 'NEUTRAL', and large banks such as Akbank, İş Bankası, and Vakıfbank give 'SELL' signals, clarifying intra-sector differentiation. In the aviation sector, TAV Havalimanları's strong buy signal contrasts with the deep sell signals of Turkish Airlines and Pegasus. On the macro front, Türkiye-specific inflation data for September 2026 came in at 29.73% annually and 1.84% monthly; in an environment where real rates remain in positive territory, the TCMB policy rate continues to hold steady at 37.0%. US Fed rates at 4.0% and ECB rates at 2.65% are shaping new market equilibria. The oil price increase (Brent 109) driven by geopolitical risk premiums carries the potential to exacerbate current account imbalances through higher import costs.

General Index Structure and Breadth

Although XU030's1.45% pullback is smaller than XU100's1.87% decline, showing the relative resilience of the index's heavyweight bank and holding stocks, the technical breadth data is weak. The average channel position percentage has dropped below50% in most stocks, indicating a risk of drifting into the lower half of the trend channels. The number of stocks with positive Pearson correlation coefficients (r) above 0.40 is limited (Yapı Kredi 0.43, Tüpraş 0.59, Vakıfbank 0.65), and for most of these stocks the overall signal is "SELL"; this also reduces the reliability of trend-following strategies.

Effects of Foreign Exchange and Commodities

The relatively calm trading of USD/TRY at the 49.59 level means that the index's decline in TL terms is almost fully reflected in dollar-based performance (XU030 -1.50% in USD terms). The gold ounce price has retreated from the 4.143.5 USD level to 6.603.40 TL/gram; this suggests that the risk-aversion tendency of domestic investors has concentrated on cash or time deposits instead of gold. The fall of VIX to the 17.39 level shows that global risk appetite remains at mid levels, but the US 10-year Treasury yield staying around4.93% suggests that new market entries may remain limited.

2. Sector-Based Evaluation

Banking: Selective Divergence

Yapı Kredi (Yapı Kredi), the locomotive of the banking index, is one of the few stocks that preserves its technical structure: the short/medium-term EMA alignment gives a "BUY (AL)" signal, Wave Trend stays in the buy zone and the regression channel sits in the48% mid-band. Garanti BBVA (Garanti BBVA) does give a medium-term "BUY (AL)" signal, but its short and long-term "HOLD (BEKLE)" position and the59% channel level carry the risk of weakening momentum. In the trio of Akbank (Akbank), İş Bankası (İş Bankası) and Vakıfbank (Vakıfbank), the short, medium and long-term EMAs are in a "SELL (SAT)" or "HOLD (BEKLE)" position; at Vakıfbank, strong trend data such as channel7% and Pearson 0.65 combine with the "STRONG SELL (GÜÇLÜ SAT)" signal, strengthening the possibility of a deep correction.

Aviation and Transportation: Polarization (Havacılık ve Ulaştırma: Kutuplaşma)

TAV Havalimanları (TAV Havalimanları) is the sector's only strong name, posting a "BUY/STRONG BUY" signal in both technical scan and oscillator data. However, overbought indicators such as channel104% (above the upper band), Stochastic87% and CCI 206 bring the possibility of a short-term technical pullback. Türk Hava Yolları (Türk Hava Yolları) and Pegasus (Pegasus), on the other hand, are in strong negative momentum with channel positions of%-1 and20% respectively, Wave Trend "SELL"/"BUY THE DIP" and Pearson -0.88 and -0.83; 60-day returns are at -15.4% and -15.8%.

Holdings and Industry: Broad Selling Pressure (Geniş Satış Baskısı)

Sabancı Holding (Sabancı Holding) gives a “BUY” signal on the oscillators, but the technical scan shows “SELL” and the channel51% places it in an indecisive zone. Koç Holding (Koç Holding) gives a “STRONG SELL” signal in both analysis methods. In the Energy & Petrochemicals group, Tüpraş (Tüpraş) carries a long-term “BUY” signal, but with the short/medium-term “SELL/HOLD” and oscillator “SELL” signals together with the channel level6% (close to the lower band), a technical reaction is expected in the oversold zone; the trend strength is high with ADX 30.92. Petkim (Petkim), Enka İnşaat (Enka İnşaat) and Astor Enerji (Astor Enerji) are all on “STRONG SELL”.

Retail, Automotive, Telecom and Defense: Structural Weakness

In the retail duo BİM (BİM) and Migros (Migros), 60-day returns are +0.3% and -27.8% respectively; both are in the "STRONG SELL" signal. In automotive, Tofaş (Tofaş) and Ford Otosan (Ford Otosan) have negative channel positions (% -15 and% -5), and ADX levels in the 27-36 range confirm a strong downtrend. In telecom, Turkcell (Turkcell) and Türk Telekom (Türk Telekom) are at oversold levels with RSI 37-40 and CCI -140, but the trend continues with ADX 25-16. Aselsan (Aselsan) is the sole representative of the defense sector, with RSI 45, MACD -9.26 and ADX 32 in a directionless but seller-controlled structure.

3. Technical Visual Analysis

EMA Setups and Futures Signal Consistency

According to the technical scan data, the short (5-20 days), medium (20-50 days) and long (50-200 days) EMA alignments show positive alignment only for Yapı Kredi and TAV Havalimanları, in the "BUY-BUY-WAIT" hierarchy. Garanti BBVA finds medium-term support with "WAIT-BUY-WAIT". The other 27 stocks give a "SELL" or "WAIT" signal in at least two timeframes. This indicates that trend-following strategies (for example 50/200 day EMA crossovers) are positioned on the sell side across a broad majority of the market. In particular, heavyweight stocks such as Akbank, Vakıfbank, Koç Holding and Ereğli Demir Çelik giving a "SELL" signal in all three timeframes (overall SELL) confirms the structural weakness of the index.

Wave Trend and Regression Channel Dynamics

Wave Trend osilatörü Yapı Kredi, TAV Havalimanları, Garanti BBVA, İş Bankası, Aselsan, Sabancı Holding, Pegasus, Migros için "AL" veya "DİPTE AL" sinyali üretse de, bu sinyallerin çoğu fiyatın kanal alt bandına (0%-20 aralığı) yaklaşmasıyla tetiklenen aşırı satım tepkisi olabilir. Gerçek trend değişimi sinyali için kanal konumunun 50% üstüne çıkışı ve Wave Trend'in sıfır çizgisini yukarı kesmesi gerekir. Şu an Kanal 104% ile üst bandın üzerinde seyreden TAV Havalimanları, Kanal 6% ile alt banda sıkışan Tüpraş ve Vakıfbank, Kanal %-15 ile alt bandın altına inen Tofaş uç nokta risklerini temsil ediyor. Pearson r katsayısı 0.40 üzerinde olan hisseler (Yapı Kredi 0.43, Tüpraş 0.59, Vakıfbank 0.65, Ereğli 0.55 kanal 55%) lineer regresyon eğilimine uygun hareket ediyor; ancak Ereğli ve Vakıfbank'te r pozitif ama genel sinyal "GÜÇLÜ SAT" olması, trendin aşağı yönlü ve güçlü olduğunu gösteriyor.

Diverging Stocks: Yapı Kredi and TAV Havalimanları

Yapı Kredi (Yapı Kredi): Price 36.42 TL, daily -0.65%. Short/Medium BUY, Long WAIT. WT BUY. Channel48% (mid band). R=0.43. 60-day +14.4%. This structure supports a healthy pullback scenario within the rising trend. The oscillators show slightly positive momentum with RSI 53, MACD 0.15, Stoch 86, CCI 101, but Stoch/CCI give an overbought warning.
TAV Havalimanları (TAV Havalimanları): Price 287.0 TL, daily +0.26%. Short/Medium BUY, Long WAIT. WT BUY. Channel104% (above the upper band). R=-0.11. 60d +6.3%. The price has torn through the channel upwards; this could be a "breakout" or a "blow-off top". Oscillator RSI 64, MACD 2.17, Stoch 87, CCI 206, ADX 13. Strong momentum (MACD) but weak trend strength (ADX<20) and extreme overbought (Stoch/CCI) raise the risk of a reversal.

4. Oscillator and Momentum Readings

Risks in the Overbought Zone

TAV Havalimanları (TAV Havalimanları) received a "STRONG BUY" recommendation (18 BUY / 3 SELL) in the oscillator package, but Stochastic K at87.14% and CCI(20) at 206.09 are well above the classic overbought zone (80 and +100). RSI 64.21 has not yet reached 70, while MACD 2.17 shows strong momentum. ADX 13.25, however, suggests the trend has not yet strengthened and that this move could be the burst following a "squeeze". For Garanti BBVA (Garanti BBVA) and Yapı Kredi (Yapı Kredi), Stochastic K stands at87.34% and86.21% respectively; CCI at 127.87 and 101.64. Both stocks are in short-term overbought territory; any profit-taking could pull prices back toward the middle of the channel (50%-60).

Reaction Expectation and Invalidation in the Oversold Zone

" For most stocks with a STRONG SELL (GÜÇLÜ SAT) signal, RSI is in the 30-40 range, Stochastic in 5-20 and CCI between -100 and -180. Ford Otosan (Ford Otosan) RSI 29.62, Stoch 8.47 and CCI -165.94; Tofaş (Tofaş) RSI 29.41, Stoch 7.06 and CCI -165.82; Migros (Migros) RSI 30.26, Stoch 11.19 and CCI -136.62; Astor Enerji (Astor Enerji) RSI 28.04, Stoch 11.87 and CCI -131.09. Although these levels look favourable for a technical rebound (bounce), ADX readings (Ford 36, Tofaş 27, Migros 43, Astor 36) above 25 confirm the strength of the downtrend. Bottom-fishing entries in these stocks stay high risk until ADX falls below 20 and RSI breaks above 50. Sabancı Holding (Sabancı Holding) RSI 51, ADX 36.37 diverges from the other "SELL (SAT)" stocks in both trend and momentum terms; the oscillator "BUY (AL)" signal supports this divergence.

MACD and ADX Crossover Analysis

MACD histogramı pozitif ve artan hisseler: TAV Havalimanları (2.17), Garanti BBVA (0.69), Yapı Kredi (0.15). Negatif ve derinleşen: Tüpraş (-6.39), Migros (-20.78), Gübre Fabrikaları (-21.85), Astor Enerji (-27.47). ADX > 25 ve DI- > DI+ (tahmini) olan hisseler: Aselsan (32), Tüpraş (30), Koç Holding (30), Pegasus (40), Türk Altın (35), Enka (37), Şişecam (29), Türk Hava Yolları (39), Gübre Fabrikaları (43), Migros (43), Ford Otosan (36), Astor (36). Bu grup "trend takibi satış" stratejisi için en uygun hisselerdir; herhangi bir uzun pozisyon bu hisselerde trend değişimi onayı (ADX < 20, MACD > 0, RSI > 55) alınmadan alınmamalıdır.

5. Risk Map and Scenarios

Base Case (Base Scenario): Broad Pullback Continues

The pullback from the 14.463 level may continue toward the 14.200 - 14.000 band. These levels may coincide with the 200-day EMA (estimated around 13.800-14.000) and previous low supports. While USD/TRY moves sideways in the 49.60-49.70 band, a test of Brent above 110 USD may increase selling pressure on the index due to current account concerns. Yapı Kredi's resilience in the banking index may prevent the index from slipping below 14.000; however, the bank index retracing a further2%-3 on the weight of Akbank, Vakıfbank, İş Bankası could pull XU030 down to the 14.100 level. The portfolio's -9.81% return (start 06.09.2026) is better than the performance of XU030 (-12.3%) and XU100 (-16.6%) (outperformance), so the cash ratio could be increased or hedging positions (options/inverse ETFs) evaluated.

Optimistic Scenario: Technical Reaction and Sector Rotation

If the market starts pricing in an expectation of a rate cut before the TCMB meeting (around 23-24 October; currently37% priced in), a short-term "short squeeze" may occur in banking stocks. If Yapı Kredi tests the 37.50 - 38.00 TL resistance and Garanti BBVA tests 135.00 TL, XU030 can reclaim the 14.700 (previous close) level. If TAV Havalimanları consolidates in the 295-300 TL zone and gradually digests the overbought condition (RSI below 55, Stoch below 80), the trend may continue. In this scenario, portfolio performance can track the indices.

Bearish Scenario: Structural Break (Yapısal Kırılma) and Dollar Strength

If the US 10-year Treasury yield rises above5.00% and DXY tests 102.50, USD/TRY could target the psychological level of 49,569. In that case, XU030 tests the 13.800 support (200-day EMA estimate). If Vakıfbank closes below 31.00 TL, Akbank below 65.00 TL and Koç Holding below 195.00 TL, the index could open down to 13.500 levels. The loss in the portfolio could be reduced to the -15% level; in that case, stop-loss levels (portfolio basis -12%/-15%) should be triggered and the cash position should be raised to30%-40.

Key Levels to Watch (Kritik İzlenecek Seviyeler)

• XU030 Resistance: 14.676 (previous close), 14.800 (psychological).

• XU030 Support: 14.350 (intraday low), 14.200, 14.000.

• USD/TRY: 49.70 (resistance), 49.40 (support).

• Brent: 110.00 (resistance), 107.00 (support).

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