2011
DOI: 10.1080/14697688.2011.617775
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Closed form spread option valuation

Abstract: This paper considers the valuation of a spread call when asset prices are lognormal. The implicit strategy of the Kirk formula is to exercise if the price of the long asset exceeds a given power function of the price of the short asset. We derive a formula for the spread call value, conditional on following this feasible but non-optimal exercise strategy. Numerical investigations indicate that the lower bound produced by our formula is extremely accurate. The precision is much higher than the Kirk formula. Mor… Show more

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Cited by 58 publications
(52 citation statements)
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“…Simulation may generate an accurate result, but often takes long time for computation. On the other hand, some closed form approximations are shown with good accuracy and require much less time to compute (Bjerksund and Stensland 2011). In this paper, we use the approximation in Kirk (1995), which is widely used in practice especially in energy markets (Kirk 1995) for its accuracy and simplicity.…”
Section: Modellingmentioning
confidence: 99%
“…Simulation may generate an accurate result, but often takes long time for computation. On the other hand, some closed form approximations are shown with good accuracy and require much less time to compute (Bjerksund and Stensland 2011). In this paper, we use the approximation in Kirk (1995), which is widely used in practice especially in energy markets (Kirk 1995) for its accuracy and simplicity.…”
Section: Modellingmentioning
confidence: 99%
“…Fast prices are obtained using Ī» = 3 and converged price are obtained using Ī» = 9. The errors of the three approximation methods are also provided for reference: Bjerksund and Stensland () (BjSt Err), Lo () (Lo Err), and Li et al () (LDZ Err). Factor matrices V for Ļ 12 = 90% and āˆ’90% are displayed in (b) and (c), respectively.…”
Section: Numerical Resultsmentioning
confidence: 99%
“…In this example, the adjustment step Equation (23) is triggered for V 21 with Īµ Ā¼ 0:01. In addition, this study independently implements the analytic approximation methods of Bjerksund and Stensland (2014), Lo (2015), and Li et al (2008) for spread options. 1 All the three methods work well on S1, showing errors in the order of 10 ƀ6 or less.…”
Section: Spread Optionsmentioning
confidence: 99%
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