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August 30, 2012

2012 Drought: Yield Loss, Revenue Loss, and Harvest Price Option

This article examines the impact of the 2012 drought on per acre revenue for corn and soybeans compared with the revenue expected in February. The article also examines the impact of crop insurance and, more specifically, the harvest price option, on per acre revenue. The harvest price option permits the insurance guarantee to be calculated using the higher of the insurance plant price determined in February for corn and soybeans or the price determined at harvest. Despite the reduction in yield caused by the drought, per acre revenue is higher in August than in February for the average U.S. acre of corn and soybeans. To emphasis, the previous statement is for the average acre of corn and soybeans; many farms will have yield declines greater than the average decline. However, the harvest price option may result in some of these farms also having August revenue greater than the February revenue.

2012 Perspective as of August

To calculate its revenue guarantee, crop insurance uses the average December corn futures price and average November soybean futures price during the month of February, which will subsequently be referred to as planting. For 2012, these prices are $5.68 per bushel for corn and $12.55 per bushel for soybeans (see Table 1). On August 28, 2012; December corn futures closed at $7.95 and November soybeans futures closed at $17.22.


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The primary, but not only, reason for the 40% increase in corn price and 37% increase in soybean price is the drought in the U.S. Based on a linear trendline from 1974 through 2011, U.S. average trend yield per planted acre of corn for 2012 is 157.1 bushels. In contrast, the August production report from the U.S. Department of Agriculture suggests a U.S. average yield per planted acre of 119.7 bushels, or a yield that is 24% below trend. For soybeans, the U.S. average trend yield for 2012 is 43.9 bushels per planted acre vs.35.0 bushel per planted acre in the August report, or a yield that is 20% below trend.

Using these prices and yields, revenue per planted acre expected at planting was $89277 for corn ($5.68 times 157.1) and $551 for soybeans ($12.55 times 43.9). In comparison, the revenue in August is $951 for corn ($7.95 times 119.7) and $603 for soybeans ($17.22 times 35.0). Thus, for both the average U.S. corn acre and the average U.S. soybean acre, revenue is 7% and 9%, respectively, higher in August than at planting. In other words, for the average U.S. acre of corn and soybeans, the higher price resulting from the drought has more than offset the decline in yield resulting from the drought. However, there are many farms (acres) that have lower revenue due a yield loss that is greater than the average U.S. yield loss. Note that this analysis assumes a zero basis between the cash and futures price and no forward pricing of corn and soybeans.
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Historical Perspective

The 2012 situation is not out of line with the experience in previous years of large yield declines. Table 2 contains the 5 years for corn and soybeans since 1974 that had the largest percent decline in yield relative to trend yield. Despite double digit declines in yield, revenue at harvest exceeded revenue at planting in 2 of the 5 years for corn and 4 of the 5 years for soybeans. On average across all 5 years for corn, revenue per planted acre was the same at harvest as at planting, despite a 19% average decline in yield relative to trend. For soybeans, average revenue was 7% higher at harvest than at planting even though average U.S. yield was 14% below trend.


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It is important to call attention to the 1984 observation for soybeans because, unlike the other observations in this article, the decline in revenue (-22%) exceeded the decline in yield (-9%). Thus, exceptions exist to the general storyline discussed in the previous paragraphs.

Impact of Insurance Harvest Price Option

Given the increase in corn and soybeans futures prices since planting as well as a zero futures-cash basis and no forward contracting, August revenue is less than the revenue expected at planting if the August yield is lower than 75% of trend yield (see Figures 1 and 2). In other words, August revenue is lower if yield has declined by more than 25% relative to trend yield. On the other hand, if the August yield is 75% or more of trend yield, August revenue is higher than the revenue expected at planting. Figures 1 and 2 underscore the importance of the individual farm's yield in assessing a farm's revenue situation as of August 2012.


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These two figures also provide another insight. Assuming that trend yield is the farm's insurance yield, the harvest price option was purchased, and the August 28 price is the harvest price option; the x-axis become the insurance coverage level and the numbers in the figures become the minimum revenue a farm has relative to the expected revenue at planting for a given insurance coverage level. For example, as of August 28, if a farm has at least 75% insurance coverage and no forward contracting, crop insurance will guarantee a per acre revenue that exceeds the per acre revenue expected at planting. The minimum will hold regardless of how low the yield is on the farm, including a zero yield. The reason is that all production, whatever its size, and all insurance payments, whatever its size, is made at the August 28 price because of assuming the harvest price option and no forward contracting. Stated somewhat differently, a farm that has insurance with the harvest price option must have a coverage level that is less than 75% for its revenue on August 28 to be less than the revenue it expected at planting. Again, these statements assume no forward contracting, a zero cash-futures basis, and insurance yield equal to trend yield. It is worth noting that the last assumption is more likely to be valid in 2012 than in previous years because of the availability of the trend-adjusted yield option.

To put this discussion in perspective, data from the Risk Management Agency for 2011 reveals that 85% of planted corn and soybeans acres were covered by crop insurance. Moreover, 50% of corn planted acres and 48% of soybean planted acres were insured at coverage levels of 75% or more.

Summary Observations

While the preceding analysis is simple and does not capture all of the interacting factors that happen at the farm level, it suggests that a national drought does not necessarily result in lower revenue for U.S. corn and soybean farms as a group relative to the revenue they expected when the crop was planted. The reason is that the decline in yield can be sector wide, or systemic to use the economic term. Thus, price increases, offsetting some, maybe all, and maybe more than all, of the average decline in yield. It is important to underscore that this statement holds even if insurance does not exist and that it does not hold for all farms, notably those with yield declines greater than average yield decline for the U.S. as a whole.

The availability of the harvest price option in crop insurance further means that, depending on the size of the increase in price, and assuming that a high enough insurance coverage level was purchased, a farm may have minimum revenue at harvest that exceeds the revenue expected when the crop was planted no matter what yield is, including zero. Given the more than 35% increase in corn and soybean insurance price that currently has occurred, this situation appears likely for the 2012 drought at some of the higher insurance coverage levels.

The situation discussed in the previous paragraph has prompted an emerging policy issue: should taxpayers subsidize the harvest price option for farms? Note, the issue is not whether crop farms should have access to the harvest price option, but whether it should be subsidized by the public.

In seeking to understand why this issue has arisen, it is important to first point out that a primary reason historically cited for consumer and taxpayer support of farm programs is an assured supply of food. Crop insurance can be viewed as furthering this goal by offering farms protection against the risk of production or revenue declines. However, when farms decide to purchase insurance, they in essence are saying that they are willing to produce the crop for the planting insurance price. Hence, the planting insurance price, not the harvest insurance price, aligns with the historical U.S. policy concern regarding an assured supply of food.

A second reason for the emergence of this issue is that insurance is designed to protect not against the physical loss of an asset but against the financial loss associated with the physical loss of an asset. This is a subtle but important distinction. For example, if the physical loss of an asset causes no financial harm, it is doubtful that most individuals would buy insurance to cover the physical loss. In this context, the physical loss of yield does not necessarily translate into a financial loss relative to the revenue expected when the decision was made to plant the crop. The reason is that yield risk can be systemic or wide spread. Thus, price can increase more than yield declines, resulting in no financial loss associated with the physical loss of yield. Note, this question does not arise with a yield loss that is specific to an individual farm because such a loss is not enough to impact price. Hence, the issue of whether the harvest price option should be subsidized by the public arises in part because crop insurance does not distinguish between farm specific and systemic yield loss.

Advocates for the harvest price option point out that it allows crop farms to feel more comfortable forward contracting grain. The harvest price option covers the financial risk exposure of having to buy grain in the market to cover their inability to fulfill their forward contracts. The counterpoint is that the harvest price option can encourage farmers to forward contract more than is consistent with prudent risk management, especially in years of sizable yield declines. In the author's view, both of these observations are valid.

The decision on whether the harvest price option should be subsidized will come down to answering the question, what is fair and appropriate policy. This is never an easy determination. As a guide that might be of use, I have always found it worthwhile to switch places and ask, if I was taxpayer who was not a farmer, how would I feel about the policy? And, if I was both a farmer and a taxpayer, how would I feel about the policy?


This publication is also available at http://aede.osu.edu/publications.

Issued by Carl Zulauf
Department of Agricultural, Environmental and Development Economics
The Ohio State University



Posted by Carl Zulauf  Permalink

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