Prof. Dr. Güven Sayılgan

Corporate finance · CFO · Valuation · Capital markets

In the light of finance theory, rational financial decisions...

Analyses, data and applied tools for corporate finance, debt capacity, cash management, valuation and macroeconomics.

What do you want to do today?

Get practical answers to financial questions with applied tools.

Financial analysis and report

From Excel balance sheets and income statements: horizontal, vertical, trend and ratio analysis, CBRT sector comparison and a downloadable report.

Start analysis →

How much can the firm borrow?

Calculate debt capacity.

Debt Capacity →

Can I service the debt?

Analyse with DSCR.

Calculate DSCR →

What is the cost of capital?

Calculate WACC.

Calculate WACC →

13-week cash budget

Plan liquidity gaps, credit needs and critical weeks.

Cash Budget →

Financial stress test and resilience score

Multi-shock scenarios, covenants, cash runway, break points and a CFO assessment report.

Resilience analysis →

Refinancing and maturity-wall analysis

Debt calendar, funding gap, rate/FX shocks, breakpoints and a CFO assessment report.

Maturity-wall analysis →

Turkey FX risk stress test

Stress-test balance sheet, costs, interest and debt service by scenario.

Stress Test →

Turkey company valuation

DCF, EV/EBITDA multiple, WACC and scenario analysis.

Valuation tool →

Project Valuation

Model an investment’s cash flows and assess the decision with NPV, IRR, MIRR, payback, the profitability index, scenarios and sensitivity analysis.

Value the project →

Time value of money

PVIF, FVIF, PVIFA, FVIFA, annuities, loan installments and savings plans.

TVM calculator →

Break-even and profit planning

Break-even point, target profit, margin of safety, operating leverage and scenario analysis.

Break-even calculator →

Leverage and financial-risk analysis

DOL, DFL and DCL; fixed-cost, debt and interest sensitivity, stress testing.

Leverage calculator →

IRR and XIRR calculator

IRR, XIRR, NPV and XNPV from periodic or dated cash flows, with an NPV profile and multiple-IRR checks.

IRR / XIRR calculator →

Inventory growth and efficiency

Decompose inventory growth into price, quantity and activity; DIO, excess stock, aging and cash release.

Inventory analysis →

Cash conversion cycle and working capital

Compute DIO, DSO, DPO and CCC; measure cash tied in operations and the cash effect of improvement scenarios.

CCC analysis →

Working-capital financing need

Analyse working-capital need, the cash conversion cycle and any financing gap from receivables, inventory and payables days.

Analyse →

Most-used CFO tools

Financial analysis and report

From Excel balance sheets and income statements: horizontal, vertical, trend and ratio analysis, CBRT sector comparison and a downloadable report.

Start analysis →

How much can the firm borrow?

Calculate debt capacity.

Debt Capacity →

Can I service the debt?

Analyse with DSCR.

Calculate DSCR →

What is the cost of capital?

Calculate WACC.

Calculate WACC →

13-week cash budget

Plan liquidity gaps, credit needs and critical weeks.

Cash Budget →

Financial stress test and resilience score

Multi-shock scenarios, covenants, cash runway, break points and a CFO assessment report.

Resilience analysis →

Refinancing and maturity-wall analysis

Debt calendar, funding gap, rate/FX shocks, breakpoints and a CFO assessment report.

Maturity-wall analysis →

Turkey FX risk stress test

Stress-test balance sheet, costs, interest and debt service by scenario.

Stress Test →

Turkey company valuation

DCF, EV/EBITDA multiple, WACC and scenario analysis.

Valuation tool →

Project Valuation

Model an investment’s cash flows and assess the decision with NPV, IRR, MIRR, payback, the profitability index, scenarios and sensitivity analysis.

Value the project →

Time value of money

PVIF, FVIF, PVIFA, FVIFA, annuities, loan installments and savings plans.

TVM calculator →

Break-even and profit planning

Break-even point, target profit, margin of safety, operating leverage and scenario analysis.

Break-even calculator →

Leverage and financial-risk analysis

DOL, DFL and DCL; fixed-cost, debt and interest sensitivity, stress testing.

Leverage calculator →

IRR and XIRR calculator

IRR, XIRR, NPV and XNPV from periodic or dated cash flows, with an NPV profile and multiple-IRR checks.

IRR / XIRR calculator →

Inventory growth and efficiency

Decompose inventory growth into price, quantity and activity; DIO, excess stock, aging and cash release.

Inventory analysis →

Cash conversion cycle and working capital

Compute DIO, DSO, DPO and CCC; measure cash tied in operations and the cash effect of improvement scenarios.

CCC analysis →

Working-capital financing need

Analyse working-capital need, the cash conversion cycle and any financing gap from receivables, inventory and payables days.

Analyse →

Finance data center

Macro indicators for CFO decisions - grouped, sourced, and refreshed on schedule.

Last updated:

The site checks market data every 5 minutes, daily series every 30 minutes, and monthly/quarterly series once a day. The period on each card is the indicator’s own release frequency.

Indicator Value Change CFO lens Source
Financing
CBRT policy rate ⓘ Data period: MPC decision 37.00% Last decision: September 2026 Direction of borrowing cost CBRT / Trading Economics
TL commercial loan rate ⓘ Data period: Weekly 49.77% As of: September 18, 2026 Closest macro proxy to a firm's funding cost CBRT – EVDS
2Y / 10Y bond yields ⓘ Data period: Daily 40.52% / 35.67% Long-term funding and discount rates Trading Economics
Turkey 5Y CDS ⓘ Data period: Intraday 245.17 bp FX funding and country risk premium World Government Bonds
FX and inflation
USD/TRY ⓘ Data period: Intraday 48.99 +0.32% Imports, FX debt, pricing Yahoo Finance
EUR/TRY ⓘ Data period: Intraday 55.47 −0.83% Exports/imports with Europe Yahoo Finance
CPI ⓘ Data period: Monthly 31.51% As of: July 2026 Previous: 31.75% −0.2 pp Wages, pricing, real sales growth TurkStat / Trading Economics
PPI ⓘ Data period: Monthly 27.95% As of: August 2026 Production costs and margin pressure TurkStat / Trading Economics
Real effective exchange rate ⓘ Data period: Monthly 105.04 As of: August 2026 Competitiveness and real FX level CBRT
Real economy
GDP growth ⓘ Data period: Quarterly 2.30% As of: Q2 2026 Aggregate demand TurkStat / Trading Economics
Industrial production ⓘ Data period: Monthly -0.30% As of: July 2026 Direction of the production economy TurkStat / Trading Economics
Capacity utilization ⓘ Data period: Monthly 74.20% As of: August 2026 Previous: 73.50% +0.7 pp Demand and investment needs TurkStat / Trading Economics
Real sector confidence ⓘ Data period: Monthly 102.00 As of: August 2026 Business expectations TurkStat / Trading Economics
PMI ⓘ Data period: Monthly 48.10 As of: July 2026 Leading indicator for orders, output and demand Trading Economics
Liquidity and credit
Commercial loan growth ⓘ Data period: Monthly 2.26% Access to finance CBRT / Trading Economics
TL/FX credit volume ⓘ Data period: Daily 21,040.1 milyar TL As of: August 1, 2026 Direction of credit conditions BRSA (BDDK)
Deposit rates ⓘ Data period: Weekly 44.02% As of: September 18, 2026 Alternative cost of funds CBRT – EVDS
CBRT reserves ⓘ Data period: Weekly 174,405 mn USD As of: September 18, 2026 FX/financial stability risk CBRT – EVDS
External balance and costs
Current account ⓘ Data period: Monthly 36 mn USD As of: July 2026 FX and external funding pressure CBRT – EVDS
Trade balance ⓘ Data period: Monthly -5,239 mn USD FX demand and economic activity TurkStat / Trading Economics
Brent crude ⓘ Data period: Intraday $97.00 −9.01% Energy costs Yahoo Finance
Natural gas ⓘ Data period: Intraday $3.04 −7.89% Production costs Yahoo Finance
USD/EUR ⓘ Data period: Intraday 1.1320 −1.12% Critical for EU-facing exporters Yahoo Finance

My Books

Information about the books I have published so far can be found in this section.

All my books and other publications →

Hisse Senetleri Piyasası Endeksleri

Hisse Senetleri Piyasası Endeksleri

Kuram, Uygulama, Bir Model Önerisi

2005 · Turhan Kitabevi

Finansal Piyasalar ve Finansman Teknikleri

Finansal Piyasalar ve Finansman Teknikleri

Soru ve Yanıtlarla - İş Sınavlarına Hazırlık

2004 · Turhan Kitabevi

TMS-17 Kiralama İşlemleri Standardı Uygulama Rehberi

TMS-17 Kiralama İşlemleri Standardı Uygulama Rehberi

Tesmer Yayın No: 72

TÜRMOB

Küreselleşme, Avrupa Birliği ve Muhasebe Mesleğinde Yeni Ufuklar

Küreselleşme, Avrupa Birliği ve Muhasebe Mesleğinde Yeni Ufuklar

XX. Türkiye Muhasebe Eğitimi Sempozyumu

XX. Türkiye Muhasebe Eğitimi Sempozyumu

Muhasebe Eğitiminde Yeni Ufuklar - Bildiriler Kitabı (23–27 Mayıs 2011, Kemer, Antalya). Editörler: Ercan Bayazıtlı, Güven Sayılgan, Kadir Gürdal, Mustafa Doğan

2011 · Sempozyum bildiri kitabı