{"id":103231,"date":"2021-09-16T11:10:00","date_gmt":"2021-09-16T15:10:00","guid":{"rendered":"https:\/\/ibkrcampus.com\/?p=103231"},"modified":"2022-11-21T09:48:02","modified_gmt":"2022-11-21T14:48:02","slug":"dynamic-futures-portfolio-in-a-regime-switching-market","status":"publish","type":"post","link":"https:\/\/www.interactivebrokers.com\/campus\/ibkr-quant-news\/dynamic-futures-portfolio-in-a-regime-switching-market\/","title":{"rendered":"Dynamic Futures Portfolio in a Regime-Switching Market"},"content":{"rendered":"\n<p><strong>Regime-Switching Market<\/strong>&nbsp;<\/p>\n\n\n\n<p>Asset prices are often seen as being dependent on market conditions. Market regimes may change suddenly and persist for a period of time. The unpredictability of the timing of regime changes also means that associated risks are almost impossible to hedge.&nbsp;<\/p>\n\n\n\n<p>In order to capture these crucial properties of market dynamics, one major approach is to represent stochastic market regimes by a finite-state Markov chain. In most cases, the Markov chain is an exogenous random process and is not directly tradable. The effects of the Markov chain are reflected in the asset price dynamics. In particular, the asset\u2019s expected return and volatility may vary across regimes.&nbsp;<\/p>\n\n\n\n<p>Regime-switching time series models have been used for decades. In addition to representing asset price dynamics through changing market conditions, regime-switching models have been applied to many problems in economics and finance, including derivatives pricing and portfolio selection.&nbsp;<\/p>\n\n\n\n<p><strong>Futures Trading Problem<\/strong>&nbsp;<\/p>\n\n\n\n<p>In our new<a href=\"https:\/\/papers.ssrn.com\/sol3\/papers.cfm?abstract_id=3469721\" target=\"_blank\" rel=\"noreferrer noopener\">&nbsp;<\/a><a href=\"https:\/\/papers.ssrn.com\/sol3\/papers.cfm?abstract_id=3469721\" target=\"_blank\" rel=\"noreferrer noopener\">paper<\/a>, we present a stochastic control approach to generate dynamic futures trading strategies. We consider a general regime-switching framework in which the stochastic market regime is represented by a continuous-time finite-state Markov chain. The underlying asset\u2019s spot price is modeled by a Markov modulated diffusion process.&nbsp;<\/p>\n\n\n\n<p>Under the regime-switching market framework, we first derive the no-arbitrage price dynamics for the futures contracts and provide a numerical method to compute the prices.&nbsp;<\/p>\n\n\n\n<p>Next, we determine the optimal futures trading strategy by solving a stochastic control problem. Our portfolio optimization approach allows for trading different numbers of futures. By analyzing and solving the associated Hamilton-Jacobi-Bellman (HJB) equations, we derive the investor\u2019s optimal futures position over time as a function of time, spot price, and market regime.&nbsp;<\/p>\n\n\n\n<p><strong>Regime-Switching Mean-Reverting Model<\/strong>&nbsp;<\/p>\n\n\n\n<p>Our general framework captures many different regime-switching models. For example, we introduce the Regime-Switching Exponential Ornstein-Uhlenbeck&nbsp;(RS-XOU) model that is mean-reverting as well as regime-switching. The log price of the underlying asset follows the stochastic differential equation:&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"528\" height=\"51\" data-src=\"\/campus\/wp-content\/uploads\/sites\/2\/2021\/09\/image-81.png\" alt=\"\" class=\"wp-image-103336 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/09\/image-81.png 528w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/09\/image-81-300x29.png 300w\" data-sizes=\"(max-width: 528px) 100vw, 528px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 528px; aspect-ratio: 528\/51;\" \/><\/figure>\n\n\n\n<p>where the coefficients are functions of \u03be, a continuous-time irreducible finite-state Markov chain with state-space&nbsp;<em>E = {1, 2, . . . , M}<\/em>.&nbsp;<\/p>\n\n\n\n<p>In a two-regime example, we simulate a scenario where the market starts in regime 2, then switches to regime 1 (at time t1) before returning to regime 2 (at time t2). Sample paths of the futures prices and optimal positions are shown below.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"624\" height=\"518\" data-src=\"\/campus\/wp-content\/uploads\/sites\/2\/2021\/09\/image-82.png\" alt=\"\" class=\"wp-image-103338 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/09\/image-82.png 624w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/09\/image-82-300x249.png 300w\" data-sizes=\"(max-width: 624px) 100vw, 624px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 624px; aspect-ratio: 624\/518;\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center\"><em>Sample paths of the spot price, T1-futures price, and T2-futures price over the trading horizon under the RS-XOU model. The market starts in regime 2, then switches to regime 1 at time t1, before switching back to regime 2 at time t2. Source:&nbsp;<\/em>T. Leung and Y. Zhou (2019) available at <a href=\"https:\/\/arxiv.org\/abs\/1910.06432\">https:\/\/arxiv.org\/abs\/1910.06432<\/a>.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"624\" height=\"491\" data-src=\"\/campus\/wp-content\/uploads\/sites\/2\/2021\/09\/image-83.png\" alt=\"\" class=\"wp-image-103341 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/09\/image-83.png 624w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2021\/09\/image-83-300x236.png 300w\" data-sizes=\"(max-width: 624px) 100vw, 624px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 624px; aspect-ratio: 624\/491;\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center\"><em>Sample paths of the optimal positions in the T1-futures and T2-futures respectively under the RS-XOU model. The futures positions tend to decrease over time and approach zero near the end of the trading horizon. Jumps in both positions occur at the regime-switching times t1 and t2. Source:&nbsp;T. Leung and Y. Zhou (2019) available at <a href=\"https:\/\/arxiv.org\/abs\/1910.06432\">https:\/\/arxiv.org\/abs\/1910.06432<\/a>.&nbsp;<\/em><\/p>\n\n\n\n<p><strong>References<\/strong>&nbsp;<\/p>\n\n\n\n<p>T. Leung and Y. Zhou (2020), A Stochastic Control Approach to Futures Trading with Regime Switching [<a href=\"https:\/\/ieeexplore.ieee.org\/document\/9147507\" target=\"_blank\" rel=\"noreferrer noopener\">link<\/a>], in the Proceedings of the&nbsp;<strong>American Control Conference<\/strong>&nbsp;<\/p>\n\n\n\n<p>T. Leung and Y. Zhou (2019), Optimal Dynamic Futures Portfolio in a Regime-Switching Market Framework [<a href=\"https:\/\/arxiv.org\/abs\/1910.06432\" target=\"_blank\" rel=\"noreferrer noopener\">pdf<\/a>], International Journal of Financial Engineering, Vol. 6, \u21164, p.1950034&nbsp;<\/p>\n\n\n\n<p><a href=\"https:\/\/scholar.google.com\/citations?user=P40aOHIAAAAJ&amp;hl=en\" target=\"_blank\" rel=\"noreferrer noopener\">Google Scholar<\/a>&nbsp;\/\/<a href=\"https:\/\/www.linkedin.com\/in\/timstleung\/\" target=\"_blank\" rel=\"noreferrer noopener\">&nbsp;<\/a><a href=\"https:\/\/www.linkedin.com\/in\/timstleung\/\" target=\"_blank\" rel=\"noreferrer noopener\">Linkedin Page<\/a>&nbsp;\/\/<a href=\"https:\/\/sites.google.com\/site\/timleungresearch\/research\" target=\"_blank\" rel=\"noreferrer noopener\">&nbsp;<\/a><a href=\"https:\/\/sites.google.com\/site\/timleungresearch\/research\" target=\"_blank\" rel=\"noreferrer noopener\">Homepage<\/a>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Asset prices are often seen as being dependent on market conditions. Market regimes may change suddenly and persist for a period of time. The unpredictability of the timing of regime changes also means that associated risks are almost impossible to hedge.<\/p>\n","protected":false},"author":189,"featured_media":103331,"comment_status":"closed","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[339,338,341,352,344],"tags":[10337,10205,10340,10336,10342,10335,10341,10338,10343,10339],"contributors-categories":[13668],"class_list":{"0":"post-103231","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-data-science","8":"category-ibkr-quant-news","9":"category-quant-development","10":"category-quant-north-america","11":"category-quant-regions","12":"tag-asset-price-dynamics","13":"tag-dynamic-futures-portfolio","14":"tag-hamilton-jacobi-bellman-hjb-equations","15":"tag-markov-chain","16":"tag-regime-switching-exponential-ornstein-uhlenbeck-rs-xou-model","17":"tag-regime-switching-market","18":"tag-regime-switching-mean-reverting-model","19":"tag-regime-switching-time-series-models","20":"tag-stochastic-differential-equation","21":"tag-stochastic-market-regime","22":"contributors-categories-computational-finance-risk-management-university-of-washington"},"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Dynamic Futures Portfolio in a Regime-Switching Market<\/title>\n<meta name=\"description\" content=\"Asset prices are often seen as being dependent on market conditions. 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