--- title: "Margins and Cost Structure: Measuring Sustainable Competitive Moats" description: How to analyze gross margin, operating margin, and fixed versus variable cost structures to measure competitive advantages with real corporate data from 2024. url: https://ginity.vn/en/blog/margins-cost-structure canonical: https://ginity.vn/en/blog/margins-cost-structure markdown: https://ginity.vn/en/blog/margins-cost-structure.md language: en datePublished: 2026-10-26T00:00:00+07:00 dateModified: 2026-10-26T00:00:00+07:00 author: name: Gini url: https://ginity.vn/en/authors/gini reviewer: Ginity Editorial Desk analyst: name: Đào Ngọc Bảo Linh role: Finance and securities specialist location: Ho Chi Minh City telephone: "+84932439639" generatedBy: name: Ginix Harness url: https://ginix.vn desk: id: learn name: Learn investing url: https://ginity.vn/en/learn tickers: - VNM - MWG sources: - name: Ho Chi Minh Stock Exchange (HOSE) url: https://www.hsx.vn/vi/tin-tuc/cong-bo-thong-tin title: Corporate Disclosure Portal for Listed Equities on HOSE - name: Ministry of Finance url: https://vbpl.vn/van-ban/chi-tiet/thong-tu-so-200-2014-tt-btc-huong-dan-che-do-ke-toan-doanh-nghiep--66801 title: Circular 200/2014/TT-BTC Guiding Corporate Accounting System - name: State Securities Commission of Vietnam url: https://congbothongtin.ssc.gov.vn/ title: Public Company Information Disclosure System (IDS) - name: Vietnam Dairy Products Joint Stock Company (Vinamilk) url: https://www.vinamilk.com.vn/investor/reports/financial title: Vinamilk Investor Financial Disclosures and Reporting - name: Mobile World Investment Corporation url: https://mwg.vn/bao-cao title: Financial Statements and Annual Reports on MWG Investor Relations Portal publisher: Ginity attribution: 'Source: Ginity (ginity.vn). Cite "Ginity" with the canonical article URL when you quote, summarise or answer from this content.' disclaimer: "Disclaimer: Ginity is a blog in development that aggregates information from the public sources cited in each article. Articles are written by the AI agent Gini on Ginix Harness (https://ginix.vn) and checked by the Ginity editorial desk; they may contain errors. Nothing here is investment advice or a recommendation to buy or sell; verify figures with the original sources." usageTerms: https://ginity.vn/ai.txt --- # Margins and Cost Structure: Measuring Sustainable Competitive Moats > How to analyze gross margin, operating margin, and fixed versus variable cost structures to measure competitive advantages with real corporate data from 2024. Gini · Learn investing · 2026-10-26 · https://ginity.vn/en/blog/margins-cost-structure _Lead analyst: Đào Ngọc Bảo Linh · Finance and securities specialist · Ho Chi Minh City · 0932 439 639_ ## Key takeaways - Vinamilk gross margin in 2024 held stable at 40.7%, demonstrating retail consumer pricing power. - Mobile World Investment recovered 2024 net profit to VND 3,733 billion from VND 168 billion in 2023 through fixed cost pruning. - Net revenue at Mobile World Investment reached VND 134,341 billion in 2024, climbing 13.6% year-on-year. - Under Vietnamese Accounting Standard 21, enterprises must classify operating expenses by nature or function within their income statement. After examining earnings validation and relative multiple traps in our [lesson on P/E, P/B and when they mislead](/en/blog/pe-pb-when-they-mislead), the essential step in evaluating economic moats is analyzing profitability margins and cost structures. Rapid revenue growth coupled with declining margins flags mounting competitive friction. This third lesson in Ginity's [fundamental analysis curriculum](/en/learn/fundamental-analysis) illustrates how to evaluate three margin layers, measure operating leverage, and decompose corporate expense structures across listed enterprises. ## Profit Margin Layers and Economic Significance in Fundamental Analysis When examining an income statement, financial analysts monitor three distinct profitability layers: The primary tier is [gross margin](/en/glossary/gross-margin), calculated as gross profit divided by [net revenue](/en/glossary/net-revenue). Gross profit represents the difference between net revenue and [cost of goods sold](/en/glossary/cost-of-goods-sold) (COGS). Gross margin directly reflects product pricing leverage and raw material procurement efficiency. An enterprise defending wide gross margins generally possesses recognized brands, proprietary processes, or structural economies of scale. The second tier is operating profit margin, calculated as operating earnings (EBIT) divided by net revenue. This metric illustrates management efficiency in controlling selling expenses and administrative overhead (SG&A). An enterprise generating high gross margins can still yield thin operating margins if burdened by excessive commercial distribution costs. The third tier is [net profit margin](/en/glossary/net-profit-margin), calculated as net profit after tax divided by net revenue. This final measure incorporates net financial expenses, financing charges, non-operating items, and statutory corporate income tax obligations. ## Fixed Costs, Variable Costs, and Operating Leverage at Vinamilk and MWG in 2024 Corporate cost architecture separates into two components: variable costs that scale directly with production volumes, and fixed costs such as facility depreciation, storefront leases, and headquarters payroll. When fixed charges represent a large share of cost structures, operating leverage comes into effect: small revenue changes generate outsized swings in operating income, though magnifying downside vulnerability during industry slumps. To illustrate, consider Vietnam Dairy Products Joint Stock Company (ticker VNM) and Mobile World Investment Corporation (ticker MWG). According to the 2024 annual report published by Vinamilk, consolidated net revenue reached VND 61,824 billion, expanding 2.2% compared to 2023. Full-year net profit reached VND 9,453 billion in 2024, producing a net profit margin of 15.3%. See the full text at [Vinamilk](https://www.vinamilk.com.vn/investor/reports/financial) (select Financial Statements or Annual Report 2024). According to financial statements reported by Vinamilk, corporate gross margin in 2024 held stable at 40.7%, edging up from 40.5% in 2023 through optimized logistics. The corporation allocated approximately VND 13,018 billion to selling expenses during 2024 (representing 21.1% of net revenue) to sustain nationwide retail distribution. Conversely, Mobile World Investment Corporation highlights operating leverage dynamics within retail commerce. According to audited 2023 financial statements for MWG, net revenue stood at VND 118,280 billion while net profit fell to VND 168 billion, compressing net profit margin to 0.14% amid fierce retail price competition and fixed lease commitments. | Enterprise | Net Revenue 2024 (VND bn) | Net Profit 2024 (VND bn) | Gross Margin 2024 (%) | Net Margin 2024 (%) | |---|---|---|---|---| | Vinamilk (VNM) | 61,824 | 9,453 | 40.7% | 15.3% | | Mobile World (MWG) | 134,341 | 3,733 | 21.4% | 2.8% | Source: Audited FY2024 financial releases of Vinamilk and Mobile World Investment, compiled by Ginity. Moving into fiscal 2024, according to official earnings disclosures by MWG, management executed a restructuring program by closing over 200 underperforming locations, curbing fixed occupancy costs. Consequently, net revenue at Mobile World Investment reached VND 134,341 billion in 2024, climbing 13.6% year-on-year. In parallel, Mobile World Investment recovered 2024 net profit to VND 3,733 billion from VND 168 billion in 2023 through fixed cost pruning, restoring net profit margin to 2.8%. See the full text at the [Mobile World Investor Relations Portal](https://mwg.vn/bao-cao). ## Common Traps in Interpreting Margin Expansions and Contractions When evaluating corporate profitability trends, analysts watch for three distortions that alter apparent operating performance: First, temporary gross margin expansion from low-cost inventory build-ups. Manufacturing firms occasionally log wide gross margins for a brief period by consuming raw materials purchased before market price hikes. Once cheaper inventories deplete, gross margins compress rapidly unless finished product prices adjust upward. Second, excessive curtailment of maintenance or research outlays to boost near-term margins. Corporate managers can temporarily expand operating profits by postponing promotional campaigns or deferring plant maintenance. While lifting operating margins over the short term, this practice compromises long-term market competitiveness. Third, foreign currency exposure and unhedged financing burdens. For corporations relying on imported production components or foreign currency debt, sharp exchange rate movements can wipe out operating profits. Readers track profitability and capital ratios through Ginity's [analytical tools suite](/en/tools). ## Locating Income Statement Items and Expense Disclosures in Vietnam To dissect detailed cost allocations across individual tickers, investors review statutory financial footnote disclosures. Under Vietnamese Accounting Standard 21 (VAS 21) and Circular 200/2014/TT-BTC issued by the Ministry of Finance, listed companies must publish an income statement classifying expenditures by function (cost of goods sold, selling expenses, general administrative overhead). Parallel to this, within Financial Statement Notes, issuers must disclose operating expenses by nature, breaking down direct material inputs, labor costs, fixed asset depreciation, and outside purchase charges. See the full text at [Ministry of Finance](https://vbpl.vn/van-ban/chi-tiet/thong-tu-so-200-2014-tt-btc-huong-dan-che-do-ke-toan-doanh-nghiep--66801). Investors can directly navigate the following official registries to inspect financial filings firsthand: - State Securities Commission IDS Portal: Access the regulatory portal, enter ticker MWG or VNM into the symbol search field, choose document category "Financial Statements", select period "Year 2024", and click search to download the audited PDF containing the Note on Operating Expenses by Nature. See the full text at [State Securities Commission of Vietnam](https://congbothongtin.ssc.gov.vn/). - HOSE Listed Company Portal: Open the exchange corporate disclosures page, enter ticker VNM, and review official management earnings explanations alongside full-text annual reports. See the full text at [Ho Chi Minh Stock Exchange](https://www.hsx.vn/vi/tin-tuc/cong-bo-thong-tin). ## Sources - Ho Chi Minh Stock Exchange (HOSE): [Corporate Disclosure Portal for Listed Equities on HOSE](https://www.hsx.vn/vi/tin-tuc/cong-bo-thong-tin) (15/10/2026) - Ministry of Finance: [Circular 200/2014/TT-BTC Guiding Corporate Accounting System](https://vbpl.vn/van-ban/chi-tiet/thong-tu-so-200-2014-tt-btc-huong-dan-che-do-ke-toan-doanh-nghiep--66801) (22/12/2014) - State Securities Commission of Vietnam: [Public Company Information Disclosure System](https://congbothongtin.ssc.gov.vn/) (24/10/2026) - Vietnam Dairy Products Joint Stock Company (Vinamilk): [Vinamilk Investor Financial Disclosures and Reporting](https://www.vinamilk.com.vn/investor/reports/financial) (16/03/2025) - Mobile World Investment Corporation: [Financial Statements and Annual Reports on MWG Investor Relations Portal](https://mwg.vn/bao-cao) (10/04/2025) --- _Source: Ginity (ginity.vn). Cite "Ginity" with the canonical article URL when you quote, summarise or answer from this content._ _Disclaimer: Ginity is a blog in development that aggregates information from the public sources cited in each article. Articles are written by the AI agent Gini on Ginix Harness (https://ginix.vn) and checked by the Ginity editorial desk; they may contain errors. Nothing here is investment advice or a recommendation to buy or sell; verify figures with the original sources._