{"id":9053,"date":"2026-07-16T11:26:33","date_gmt":"2026-07-16T11:26:33","guid":{"rendered":"https:\/\/quantstrategy.io\/blog\/fixed-fractional-vs-fixed-ratio-which-position-sizing-model\/"},"modified":"2026-07-16T11:26:33","modified_gmt":"2026-07-16T11:26:33","slug":"fixed-fractional-vs-fixed-ratio-which-position-sizing-model","status":"publish","type":"post","link":"https:\/\/quantstrategy.io\/blog\/fixed-fractional-vs-fixed-ratio-which-position-sizing-model\/","title":{"rendered":"Fixed Fractional vs. Fixed Ratio: Which Position Sizing Model Fits Your Style &#8211; Van Tharp?"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/quantstrategy.io\/blog\/wp-content\/uploads\/2026\/07\/charts_laptop_data_pexels_5.jpg\" alt=Fixed Fractional vs. Fixed><br \/>\nChoosing between **Fixed Fractional vs. Fixed Ratio: Which Position Sizing Model Fits Your Style &#8211; Van Tharp?** is a pivotal decision for any trader seeking long-term profitability. This comparison is a core component of <a href=\"https:\/\/quantstrategy.io\/blog\/the-ultimate-guide-to-van-tharps-position-sizing-strategies\">The Ultimate Guide to Van Tharp\u2019s Position Sizing Strategies for Consistent Trading Success<\/a>. While Fixed Fractional sizing scales your risk as a constant percentage of equity, making it ideal for managing <a href=\"https:\/\/quantstrategy.io\/blog\/the-impact-of-position-sizing-on-drawdown-recovery-a\">the impact of position sizing on drawdown recovery<\/a>, the Fixed Ratio model utilizes a &#8220;delta&#8221; to control growth speed. Choosing the right one depends on your risk tolerance, account size, and the specific <a href=\"https:\/\/quantstrategy.io\/blog\/backtesting-position-sizing-models-finding-your-optimal\">backtesting position sizing models<\/a> you have verified for your system.<\/p>\n<h2 id=\"the-fixed-fractional-model-consistent-risk-percentage\">The Fixed Fractional Model: Consistent Risk Percentage<\/h2>\n<p>In Van Tharp\u2019s framework, Fixed Fractional sizing is the most common approach. You risk a set percentage (e.g., 1% or 2%) of your total equity on each trade. This model is inherently designed to protect against &#8220;ruin&#8221; because as your account balance decreases, your absolute dollar risk per trade also decreases. It is deeply tied to <a href=\"https:\/\/quantstrategy.io\/blog\/understanding-r-multiples-the-core-of-van-tharps-risk\">Understanding R-Multiples: The Core of Van Tharp\u2019s Risk Management<\/a>, as it ensures your 1R loss remains proportionate to your current capital. Traders often use this when <a href=\"https:\/\/quantstrategy.io\/blog\/using-atr-for-position-sizing-a-practical-implementation-of\">using ATR for position sizing<\/a> to account for market volatility.<\/p>\n<h2 id=\"the-fixed-ratio-model-geometric-growth-with-a-delta\">The Fixed Ratio Model: Geometric Growth with a Delta<\/h2>\n<p>Developed by Ryan Jones and often discussed by Tharp, Fixed Ratio sizing focuses on the relationship between profit and increased risk. Instead of a percentage, you use a &#8220;delta&#8221;\u2014a dollar amount of profit required to increase your position size by one unit. This is often preferred for <a href=\"https:\/\/quantstrategy.io\/blog\/position-sizing-for-small-accounts-applying-van-tharps\">position sizing for small accounts<\/a> because it allows for more aggressive scaling once a certain profit threshold is met, without the extreme volatility of high-percentage fractional models.<\/p>\n<h2 id=\"practical-examples-and-case-studies\">Practical Examples and Case Studies<\/h2>\n<ul>\n<li><strong>Case Study 1: The Conservative Equity Trader.<\/strong> A trader with $100,000 uses a 1% Fixed Fractional model. After a series of losses reduces the account to $90,000, their next risk amount automatically drops from $1,000 to $900. This demonstrates <a href=\"https:\/\/quantstrategy.io\/blog\/the-psychology-of-risk-why-position-sizing-is-more\">the psychology of risk<\/a>, prioritizing survival over aggressive recovery.<\/li>\n<li><strong>Case Study 2: The Aggressive Futures Scalper.<\/strong> Using Fixed Ratio with a $5,000 delta, a trader starts with one contract. They must earn $5,000 in profit to move to two contracts ($5,000 total profit). To move to three contracts, they need another $10,000 in profit (2 units x $5,000 delta). This manages leverage effectively in <a href=\"https:\/\/quantstrategy.io\/blog\/advanced-position-sizing-for-options-and-futures-managing\">advanced position sizing for options and futures<\/a>.<\/li>\n<li><strong>Case Study 3: The Crypto Volatility Approach.<\/strong> In <a href=\"https:\/\/quantstrategy.io\/blog\/position-sizing-in-crypto-markets-adapting-tharps-models\">position sizing in crypto markets<\/a>, a trader might combine these models by using Fixed Fractional for baseline risk but switching to Fixed Ratio deltas during parabolic runs to lock in gains more effectively.<\/li>\n<\/ul>\n<h2 id=\"choosing-your-style-based-on-market-scenery\">Choosing Your Style Based on Market Scenery<\/h2>\n<p>Your choice should align with your &#8220;Market Scenery.&#8221; If you are trading in high-volatility environments, <a href=\"https:\/\/quantstrategy.io\/blog\/how-to-calculate-your-market-scenery-van-tharps-approach-to\">how to calculate your market scenery<\/a> will dictate whether a rigid fractional model or a flexible ratio model provides better equity curve smoothing. You can practice these dynamics through <a href=\"https:\/\/quantstrategy.io\/blog\/the-marble-game-how-van-tharp-teaches-position-sizing-and\">the marble game<\/a> to see how different models handle runs of wins and losses.<\/p>\n<h2 id=\"conclusion\">Conclusion<\/h2>\n<p>Deciding between <strong>Fixed Fractional vs. Fixed Ratio: Which Position Sizing Model Fits Your Style &#8211; Van Tharp?<\/strong> ultimately depends on your primary goal: capital preservation or aggressive growth. Fixed Fractional is the gold standard for long-term stability, while Fixed Ratio offers a unique path for those looking to scale small accounts through earned profits. To master these nuances and build a robust trading plan, refer back to <a href=\"https:\/\/quantstrategy.io\/blog\/the-ultimate-guide-to-van-tharps-position-sizing-strategies\">The Ultimate Guide to Van Tharp\u2019s Position Sizing Strategies for Consistent Trading Success<\/a> for a complete overview of risk management mastery.<\/p>\n<h2 id=\"faq\">FAQ<\/h2>\n<ul>\n<li><strong>What is the main difference between Fixed Fractional and Fixed Ratio?<\/strong> Fixed Fractional risks a constant percentage of your total equity, whereas Fixed Ratio increases position size based on a fixed dollar amount of profit (the delta) earned per unit.<\/li>\n<li><strong>Which model is better for beginners?<\/strong> Fixed Fractional is generally better for beginners as it provides a simpler, more intuitive way to manage risk and prevent total account blowouts during the learning phase.<\/li>\n<li><strong>How does Fixed Ratio help with small accounts?<\/strong> It allows traders to stay at a lower risk level until they have &#8220;earned&#8221; the right to trade larger sizes through realized profits, preventing over-leverage too early.<\/li>\n<li><strong>Can I use these models in highly volatile markets like Crypto?<\/strong> Yes, but you must adjust your parameters; many crypto traders use Fixed Fractional sizing combined with ATR to ensure they don&#8217;t get shaken out by normal price swings.<\/li>\n<li><strong>Does Van Tharp recommend one over the other?<\/strong> Tharp emphasizes that the &#8220;best&#8221; model is the one that fits your personal objectives and psychological profile, though he frequently uses Fixed Fractional as the baseline for R-multiple analysis.<\/li>\n<li><strong>What is a &#8220;Delta&#8221; in Fixed Ratio sizing?<\/strong> The delta is the specific dollar amount of profit required to increase your position by one additional unit or contract.<\/li>\n<li><strong>How do these models impact drawdown recovery?<\/strong> Fixed Fractional slows down the rate of loss during a drawdown, while Fixed Ratio requires a specific level of profit to &#8220;level up,&#8221; which can sometimes lead to slower recovery if the delta is set too high.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"Choosing between **Fixed Fractional vs. Fixed Ratio: Which Position Sizing Model Fits Your Style &#8211; Van Tharp?** is&hellip;\n","protected":false},"author":1,"featured_media":9052,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[69,40,12],"tags":[],"class_list":{"0":"post-9053","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-book-bites","8":"category-strategy_backtesting","9":"category-trading_strategies"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.9.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Fixed Fractional vs. Fixed Ratio: Which Position Sizing Model Fits Your Style - Van Tharp? 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