发表机构
Sogang Business School, Sogang University(西江大学商学院,西江大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本研究利用2012-2025年SPX和RUT期权数据,发现期权隐含利率在到期日跨年时出现2-3个基点的固定价格楔子效应,表明期权隐含利率并非完全无摩擦,并指出看跌-看涨平价可精确识别贴现率。
AI 中文摘要
期权隐含利率常被视为无摩擦的,因为完成的盒式组合提供无风险收益。我表明,这种解释要求期权端和基准端的实施楔子相互抵消。利用2012年至2025年的SPX和RUT期权数据,我发现当到期日首次跨越12月31日时,期权融资基差出现2-3个基点(未年化)的上升。该效应表现为固定价格楔子,在2010年代中期增强,在替代合约和基准中依然存在,独立出现在政府债券CIP中,并在独立构建的期权面板中得到复现。看跌-看涨平价能够精确识别贴现率,而无需确立其经济纯粹性。
英文摘要
Option-implied rates are often treated as frictionless because completed boxes deliver riskless payoffs. I show that this interpretation requires option- and benchmark-side implementation wedges to offset. Using SPX and RUT options from 2012-2025, I find a 2-3 bp unannualized increase in the option funding basis when maturity first crosses December 31. The effect behaves as a fixed price wedge, strengthens in the mid-2010s, survives alternative contracts and benchmarks, appears independently in government-bond CIP, and is reproduced in an independently constructed option panel. Put-call parity can identify discount rates precisely without establishing their economic purity.