The end of a strong run for New Zealand's beef export trade is looming as the United States continues to ramp up production and the market faces increased tariffs in Japan.
Japan - New Zealand's fourth-biggest market for beef and its most lucrative - has raised its import tariff onfrozen product to 50% from 38.5% until the end of March next year in response to import levels breaching pre-set levels.
Frozen beef accounts for about 70% of New Zealand's beef exports to Japan.
"When you have those two issues together on the supply side, it can make it a bit more challenging for the market place, even with robust demand across most major markets," ANZ rural economist Con Williams said.
US beef farmers have been playing catch-up after production there took a hit in 2013 and 2014 in response to drought and poor profitability for cow-calf operators.
AgriHQ said the outlook for beef prices was weakening in the US, the largest market for New Zealand beef, after a US Department of Agriculture report showed cattle numbers at a nine-year high as farmers rebuilt their herds.
Rival exporter Australia, which has a free-trade agreement with Japan, has increased supplies, and a rise in the NZ dollar is hurting margins, AgriHQ said.
"Sentiment in the US towards imported beef has turned negative, largely on the belief that US domestic prices will weaken in the next few months," AgriHQ analyst Reece Brick said in a report.
Mr Brick said the rising value of the kiwi dollar was "an extra thorn" in the side of exporters, with the local currency recently hitting its highest value against the US dollar since May 2015.
In Japan, beef imports in the year to June were at the highest level for the country since 2003, Mr Brick said.
This means New Zealand exporters will be forced to find alternate markets to divert product into, he said.
ASB Bank senior rural economist Nathan Penny said the Japanese tariff change was likely to put a spanner in the works for local beef prices.
The average beef export price in the Japan market for the September 2016 year was almost 20% higher than the next-best market, and around 45% higher than prices in the US, he said.
Australian beef is exempt from the tariff hike on the back of its trade agreement with Japan, so New Zealand and the US will bear most of the brunt of the increase, Mr Penny said.