Timing, Trading Frictions, and the Limits of Subsidy Capture in Livestock Risk Protection
NBER Working Papers · 2026 · Yifei Zhang、Andrew Keller、Shawn Arita、Sandro Steinbach
中文摘要
当保险产品与私人市场中交易的金融工具高度相似时,公共补贴保险项目可能产生补贴攫取的激励。牲畜风险保护(LRP)便是其中一例,因为它通过一种与交易所交易的看跌期权高度相似的合约提供价格保险。利用2020—2025年的LRP批单记录与匹配的CME期权数据,我们发现,批单活动集中在CME期权到期日前后,尤其是在架子牛和瘦肉猪这两类商品上。然而,由于生产者层面的衍生品头寸不可观测,仅凭时机模式无法识别补贴攫取。因此,我们使用观测到的合约条款、期权价格以及交易摩擦,包括买卖价差、保证金要求和融资成本,模拟LRP-CME组合策略的回报。我们发现,补贴产生的保费楔子在购买时即可观测,但已实现收益较小、因商品而异,且集中在已实现波动率低于隐含波动率的低波动率环境中。即便在这些有利情形下,与仅持有LRP相比,组合策略也会大幅恶化下行情形下的表现。进一步证据表明,聚集现象在不同波动率状态下以及2025年《LRP手册》修订后依然存在,这提示观测到的时机模式可能反映了合约对齐与常规套期保值操作,而非普遍存在且具有经济意义的补贴攫取。
Abstract
Publicly subsidized insurance programs can create incentives for subsidy capture when insured products closely resemble privately traded financial instruments. Livestock Risk Protection (LRP) is one such case because it provides price insurance through a contract that closely resembles an exchange-traded put option. Using LRP endorsement records and matched CME options data for 2020–2025, we document that endorsement activity clusters around CME option expiration dates, especially for feeder cattle and lean hogs. Because producer-level derivatives positions are unobserved, however, timing patterns alone cannot identify subsidy capture. We therefore simulate returns to combined LRP-CME strategies using observed contract terms, option prices, and trading frictions, including bid-ask spreads, margin requirements, and financing costs. We find that the subsidy-created premium wedge is observable at purchase, but realized gains are small, commodity-specific, and concentrated in low-volatility environments where realized volatility falls below implied volatility. Even in those favorable cases, combined strategies substantially worsen downside outcomes relative to holding LRP alone. Additional evidence shows that clustering persists across volatility regimes and after the 2025 revisions to the LRP Handbook, suggesting that observed timing patterns may reflect contract alignment and routine hedging practices, instead of widespread economically meaningful subsidy capture.