Overweight pigs only having ‘limited’ impact on SPP – AHDB

The current spike in overweight pigs is only have a relatively small impact on the SPP, compared with some significant other market drivers, according to AHDB analyst Duncan Wyatt.

The backlog of pigs on farm, as a result of COVID-19 outbreaks in pork plants in recent months and, more recently, Brexit delays, has seen average carcase weights soar to record levels, topping 90kg in the SPP sample for the first time in January.

Weights have fallen slightly in recent weeks – but the latest figure for the week ending January 30 of 89.54kg was still nearly 4kg above the levels of a year ago.

In the 12 months to the beginning of October 2020, heavy pigs, defined as those weighing 105kg or more made up on average just 1.2% of the SPP sample. Since then, the share has been 3.7% and in some weeks more than 6%, Mr Wyatt said.

Given that heavy pigs attract price deductions, with a knock-on effect for the influential SPP, the NPA, following a request from members, asked AHDB to remove the category from the price index’s calculations last year when pigs started to back up on farms.

Duncan Wyatt

Duncan Wyatt

But Mr Wyatt told Tuesday’s NPA town hall meeting that it would be wrong to unilaterally change the SPP calculation at the request of one sides, given that there are both buyers and sellers to the SPP contract price.

Heavy weights

But he also told the meeting that he has been crunching the numbers and found that the impact of the heavy weights on the SPP is not necessarily as much as might have been expected.

Highlighting its importance, he estimates that contracts worth £0.5bn have some reference to the SPP, but stressed it is intended simply to reflect the price of pigs, not determine their price. Over its lifetime, weekly movements upwards in the SPP (+0.62p) have on average been the same as weekly movements downwards (-0.61p), showing it does not move down quicker than it moves up, he added.

AHDB publishes ‘Historic SPP prices by weight band’ HERE.

Using this data, it can be shown that the average price for just the pig carcases under 105kg in the 12 months to the beginning of October 2020 was 0.67p/kg higher than the SPP.

Since the beginning of October 2020, the figure was, on average, 1.44p higher. So, since October, on average heavy pigs seem to have ‘discounted’ the SPP by 0.77p more than ‘usual’.

There have been individual weeks recently when the difference has been greater than 2p, although this is not unusual in the post-Christmas period, Mr Wyatt said.

“While this is certainly not nothing, the role heavy pigs is perhaps smaller than might initially have been expected,” he said.

Since the start of October, the SPP and the average price for just the pig carcases under 105kg have fallen, by 16.55p and 15.5p respectively.

“Considering that the SPP has fallen by more than 16p since the start of October, market factors have clearly had a more significant influence in depressing GB pig prices overall,” Mr Wyatt added. “There is a lot going on in terms of carcase balance. We have got ASF in Germany, which has resulted in more pork on the EU market and we have got COVID.”

He explained that there are reasons why the effect of heavy pigs on the SPP might be limited.

“Some contracts, particularly those underpinning export trade to China, reportedly have upper weight limits above 105kg at the moment,” he said.

“Secondly, in a large number of cases, when pigs are rolled due to problems encountered by processors, a weight allowance is applied. This effectively moves the top weight band in the contract, so heavy pigs are not penalised until they become even heavier.”

Weight bands

AHDB publishes throughputs in the weight bands that go into the SPP, and their prices. At the request of NPA, this includes a price specifically for pigs in the 70-104.99kg weight band.

“This is intended to reflect those standard pigs that meet more typical ‘commercial’ contract specifications on weight. Its purpose, like the SPP, is to reflect the price of pigs sold in any particular week, not set them,” Mr Wyatt added.

Latest SPP

The latest update from AHDB shows the EU-spec SPP fell by a further 1.18p in the week ending January 30, to average 140.51p/kg. It is now more than 22p below where it was at the same point last year.

Estimated throughput for the week totalled 170,100 head, down 7% on the week before and down 5% from the same week last year. This is the first time this year estimates have been below 2020 levels, with reports indicating kill has been curtailed by COVID-19 related challenges, including at Scotland’s major Brechin plant.

Carcase weights were 620g lighter than the previous week averaged 89.54kg, but 3.97kg heavier than the same point a year ago.

  • This video explains how the SPP is calculated, what causes it to move, what doesn’t, and why it evolves slowly compared to some European price markers.

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About The Author

Editor of LBM titles Pig World and Farm Business and group editor of Agronomist and Arable Farmer. National Pig Association's webmaster. Previously political editor at Farmers Guardian for many years and also worked Farmers Weekly. Occasional farming media pundit. Brought up on a Leicestershire farm, now work from a shed in the garden in Oxfordshire. Big fan of Leicester City and Leicester Tigers. Occasional cricketer.