Pricing Options on Water in Texas


Water Options
Water Markets
Environmental Flows
Water Allocation
In-stream Flows

How to Cite

McColly, Q., Mace, R., Tissot, P., & Yoskowitz, D. (2021). Pricing Options on Water in Texas. Texas Water Journal, 12(1), 91–108.


Freshwater scarcity is a growing concern in Texas and the issues that surround it are expected to grow in the coming years. As climate change impacts the variability of precipitation patterns, some of the most useful tools to help allocate this precious, limited resource may be the tools that are most adaptable in the face of growing uncertainty. While market mechanisms are budding in the state, another market-based tool can create opportunities for efficient water allocation among stakeholders: the water option. An option is a financial product that provides a vehicle to interested parties (buyers and sellers) to create a contract that formalizes the terms of the possible future delivery of water. In cash markets for resources, the exchange of cash and the resource happens when the trade is made; in options markets, the flexibility of delivery is amplified considerably, making them useful for mitigating risk. The buyer of the contract is securing the right—not the obligation—to buy a specific amount of a resource, by a specific time, for a defined price and has the ability to decide if and when the contract gets exercised over the term of the contract. This work discusses the utility of these contracts and outlines a method to price them.


Black F, Scholes M. 1973. The pricing of options and corporate liabilities. Journal of Political Economy. 81(3):637-654. Available from:

Brewer J, Glennon R, Ker A, Libecap, G. 2008. 2006 presidential address water markets in the west: prices, trading, and contractual forms. Economic Inquiry. 46(2):91-112. Available from:

Brown TC. 2006. Trends in water market activity and price in the western United States: western U.S. water market trends. Water Resources Research. 42(9). Available from:

Chang W, Stein ML, Wang J, Kotamarthi VR, Moyer EJ. 2016. Changes in spatiotemporal precipitation patterns in changing climate conditions. Journal of Climate. 29(23):8355-8376. Available from:

Colby B, Jones L, O’Donnell M. 2014. Supply reliability under climate change: forbearance agreements and measurement of water conserved. In: Easter K, Huang Q, editors. Water Markets for the 21st Century (Vol. 11). Dordrecht (The Netherlands): Springer Netherlands. Available from:

Cui J, Schreider S. 2009. Modelling of pricing and market impacts for water options. J. Hydrol. 371(1–4):31-41. Available from:

Dore MHI. 2005. Climate change and changes in global precipitation patterns: What do we know? Environment International. 31(8):1167-1181. Available from:

Dowell T. 2013. Texas water: basics of surface water law. Texas: Texas A&M AgriLife Extension; [updated September 30, 2013; accessed 2021 Jul 22]. Available from:

[EAA] Edwards Aquifer Authority. n.d. San Antonio (Texas): Edwards Aquifer Authority; [accessed 2021 Jul 22]. Available from:

Frontier Economics. 2011. Options for scarcity pricing. Melbourne (Australia): Frontier Economics Pty. Ltd. Available from:

Glantz M, Kissel R. 2013. Multi-asset risk modeling: techniques for a global economy in an electronic and algorithmic trading era. Waltham (Massachusetts): Academic Press. 544p.

[GSA BBEST] Guadalupe, San Antonio, Mission, and Aransas Rivers and Mission, Copano, Aransas, and San Antonio Bays Basin and Bay Expert Science Team. 2011. Environmental Flows Recommendations Report Final Submission to the Guadalupe, San Antonio, Mission, and Aransas Rivers and Mission, Copano, Aransas, and San Antonio Bays Basin and Bay Area Stakeholder Committee, Environmental Flows Advisory Group, and Texas Commission on Environmental Quality. 427 p. Available from:

Hearne R, Donoso G. 2014. Water markets in Chile: are they meeting needs? In: Easter K, Huang Q, editors. Water markets for the 21st century (Vol. 11). Dordrecht (The Netherlands): Springer Netherlands. Available from:

Jaeger WK, Mikesell R. 2002. Increasing streamflow to sustain salmon and other native fish in the Pacific Northwest. Contemporary Economic Policy. 20(4):366-380. Available from:

Jercich S. 1997. California’s 1995 water bank program: purchasing water supply options. Journal of Water Resources Planning and Management. 123(1):59-65. Available from:

McColly QP. 2020. Market mechanisms and efficient allocation of water: modelling water prices, option contracts on water and enhancing frameworks [dissertation]. Corpus Christi (Texas): Texas A&M University-Corpus Christi. Available from:

McKee TB, Doesken NJ, Kleist J. 1993. The relationship of drought frequency and duration to time scale. Eighth Conference on Applied Climatology; 1993 Jan 17–22; Anaheim (California). Available from:

McSweeney AM, Raish C. 2012. Social, cultural, and economic aspects of livestock ranching on the Santa Fe and Carson National Forests. Fort Collins (Colorado): U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 199 p. General Technical Report RMRS-GTR-276. Available from:

Meijer KS, Van Beek E. 2011. A framework for the quantification of the importance of environmental flows for human well-being. Society & Natural Resources. 24(12):1252-1269. Available from:

Michelsen AM, Young RA. 1993. Optioning agricultural water rights for urban water supplies during drought. American Journal of Agricultural Economics. 75(4):1010-1020. Available from:

Montagna PA, Chaloupka C, del Rosario EA, Gordon AM, Kalke RD, Palmer TA, Turner EL. 2018a. Managing Environmental Flows and Water Resources. In: Casares J, Passerini G, Perillo G, editors. Environmental Impact IV. Boston (Massachusetts): WIT Press. p. 177-188. Available from:

Montagna PA, Hill EM, Moulton B. 2009. Role of science-based and adaptive management in allocating environmental flows to the Nueces Estuary, Texas, USA. In: Brebbia CA, Tiezzi E, editors. Ecosystems and Sustainable Development VII. Boston (Massachusetts): WIT Press. p. 559-570. Available from:

Montagna PA, Hu X, Palmer TA, Wetz M. 2018b. Effect of hydrological variability on the biogeochemistry of estuaries across a regional climatic gradient. Limnology and Oceanography. 63(6):2465-2478. Available from:

Montagna PA, Kalke RD, Ritter C. 2002. Effect of restored freshwater inflow on macrofauna and meiofauna in upper Rincon Bayou, Texas, USA. Estuaries. 25(6):1436-1447. Available from:

Montagna PA, McKinney L, Yoskowitz D. In press. Focused flows to maintain nursery habitats. Texas Water Journal.

Opdyke DR, Oborny EL, Vaugh SK, Mayes KB. 2014. Texas environmental flow standards and the hydrology-based environmental flow regime methodology. Hydrological Sciences Journal. 59(3-4):820-830. Available from:

Patoski JN. n.d. History: The Edwards Aquifer & the EAA. San Antonio (Texas): Edwards Aquifer Authority; [accessed 2019 Sep 26]. Available from:

Patterson MR. 2013. Standardization of Standard-Form Contracts: Competition and Contract Implications. William & Mary Law Review. 52:327. Available from:

Powell JW. 1879. Report on the lands of the arid region of the United States with a more detailed account of the land of Utah with maps. Washington (District of Columbia): Government Printing Office. 207 p. Available from:

Ramírez-Hernández J, Rodríguez-Burgueño JE, Zamora-Arroyo F, Carreón-Diazconti C, Pérez-González D. 2015. Mimic pulse-base flows and groundwater in a regulated river in semiarid land: riparian restoration issues. Ecological Engineering. 83:239-248. Available from:

Reisner M. 1986. Cadillac Desert. New York (NY): Viking. 674 p.

Richter BD, Baumgartner JV, Powell J, Braun DP. 1996. A method for assessing hydrologic alteration within ecosystems. Conservation Biology. 10(4):1163-1174. Available from:

Richter BD, Baumgartner JV, Braun DP, Powell J. 1998. A spatial assessment of hydrologic alteration within a river network. Regulated Rivers: Research & Management. 14(4):329-340. Available from:<329::AID-RRR505>3.0.CO;2-E.

[Sabine-Neches BBEST] Sabine and Neches Rivers and Sabine Lake Bay Basin and Bay Expert Science Team. 2009. Environmental flows recommendations report. Orange (Texas): Sabine River Authority of Texas. 1215 p. Available from:

Seager R, Lis N, Feldman J, Ting M, Williams AP, Nakamura J, Liu H, Henderson N. 2018. Whither the 100th meridian? The once and future physical and human geography of America’s arid–humid divide. Part I: the story so far. Earth Interactions. 22(5):1-22. Available from:

Simon BM. 1998. Federal acquisition of water through voluntary transactions for environmental purposes. Contemporary Economic Policy. 16(4):422-432. Available from:

Legal Information Institute: Contracts. 2019. Ithaca (New York): Legal Information Institute Cornell Law School; [accessed 2019 Sep 10]. Available from:

Svoboda M, LeComte D, Hayes M, Heim R, Gleason K, Angel J, Rippey B, Tinker R, Palecki M, Stooksbury D, et al. 2002. The drought monitor. Bulletin of the American Meteorological Society. 83(8):1181-1190. Available from:

Meadows Center: Texas environmental flows initiative. 2019. San Marcos (Texas): Meadows Center for Water and the Environment; [accessed 2021 Jul 22]. Available from:

Statewide Environmental Flows (SB3). n.d. Austin (Texas): Texas Water Development Board; [accessed 2019 Sep 10]. Available from:

[TWDB] Texas Water Development Board. 2003. A Texan’s Guide to Water and Water Rights Marketing. Austin (Texas): Texas Water Development Board. 26 p.. Available from:

[TWDB] Texas Water Development Board. 2017. Water for Texas: 2017 State Water Plan. Austin (Texas): Texas Water Development Board. 150 p. Available from:

Commodity Costs and Returns. 1997–2020. Washington (District of Columbia): U.S. Department of Agriculture Economic Research Service; [accessed 2021 Jul 22]. Available from:

Villinski, MT. 2003. A methodology for valuing multiple-exercise option contracts for water. St. Paul (Minnesota): University of Minnesota. 20 p. Working Paper WP03-4. Available from:

West TO, Bandaru V, Brandt CC, Schuh AE, Ogle SM. 2011. Regional uptake and release of crop carbon in the United States. Biogeosciences Discussions. 8(1):631-654. Available from:

White KH, Rubinstein C, Settemeyer H, Ingram M. 2017. The case for a Texas water market. Austin (Texas): Texas Public Policy Foundation. 24 p. Available from:

Williams J. 2007. Option markets for water in California: Effective management of water supply Risk. Berkeley (California): University of California, Berkeley. 14 p. UC Water Resources Center Technical Completion Report Project No. W-994. Available from:

Williamson, Brendon, Villano, Renato A, Fleming, Euan M. 2008. Structuring exotic options contracts on water to improve the efficiency of resource allocation in the water spot market. Paper presented at: Australian Agricultural and Resource Economics Society 52nd Annual Conference. 2008 Feb 5–8; Canberra (Australia). Available from:

Windcli H, Forsyth PA, Vetzal KR. 2001. Shout options: A framework for pricing contracts which can be modified by the investor. Journal of Computational and Applied Mathematics. 134(1–2):213-241. Available from:

Yoskowitz D. 1999. Spot market for water along the Texas Rio Grande: Opportunities for water management. Natural Resources Journal 39(2):345-355. Available from:

Yoskowitz DW, Montagna PA. 2009. Socio-economic factors that impact the desire to protect freshwater flow in the Rio Grande, USA. In: Brebbia CA, Tiezzi E, editors. Ecosystems and Sustainable Development VII. Boston (Massachusetts): WIT Press. p. 547-558. Available from:

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Copyright (c) 2021 Quinn McColly, Robert Mace, Philippe Tissot, David Yoskowitz