The Turnaround Tuesday theme, while late to start, played out in Chicago after all, helped by a return of weather into the headlines of the trader's script.
It was in fact pretty easy for risk assets to fall on Monday as the US government entered its second week of partial shutdown amid a fiscal impasse over which there are growing worries that it could lead to a technical debt default.
The yield on one-month Treasury bills hit 0.355% a level which, while hardly huge by historic standards, was the highest in four years.
Shares closed down 0.8% in Paris and 1.1% in London, and stood 0.8% lower in New York in late deals.
'Could interrupt deliveries'
Cocoa managed to buck the trend, extending its gains on International Cocoa Organization forecasts of five successive seasons of production deficit, starting with 2012-13, and, more immediately, on ideas that the forthcoming round of quarterly grinding data will prove strong.
Commerzbank also highlighted the importance of weather forecasts for Ivory Coast and Ghana, the top two producing countries, where "if the heavy rain forecast does come, it could interrupt deliveries to ports and thus world supplies of cocoa, at least for a time".
Cocoa for December closed up 0.7% at $2,718 a tonne in New York, a 13-month closing high.
London cocoa for December finished up 0.4% at £1,754 a tonne, a two-year closing high.
'Solid week of harvesting'
But for grains and oilseeds, the issue was drier weather forecasts, for the US, meaning an acceleration in the corn and soybean harvests, and weight on prices from the ramp up supplies.
"The weather models have definitely turned drier through next Tuesday," Darrell Holaday at Country Futures said.
"In addition, the rain early next week has been pushed more to midweek.
"Bottom line is that the weather models are indicating a solid week of harvesting activity in a large part of the Midwest and Plains," with winter wheat sowings getting a leg up too, at a time when there has been some comment about disappointing plantings of soft red winter wheat, grown largely in the Midwest.
'Yield expectations are getting bigger'
With markets back prioritising supply factors, the encouraging yields from harvest gained more attention too.
"The debate regarding a higher yield is waning with few who believe that USDA will not eventually raise corn and soybean yields," Mr Holaday said.
"The only question is how much."
At US Commodities, Don Roose, the broker's president, told Agrimoney.com that "yield expectations are getting bigger".
Indeed, traders had forecast ahead of the US Department of Agriculture's Wasde report which had been due for Friday, but which will not now be released thanks to the government shutdown, that a lift to 156.5 bushels per acre, from 155.3 bushels per acre, in the US corn yield estimate was on the cards.
For soybeans, the USDA was expected to lift its yield forecast by 0.3 bushels per acre to 41.5 bushels per acre.
That does not mean that the uncertainty over the US crop size is over.
Mr Roose said: "What the trade would really like to see is the acreage numbers, and how much was lost to prevent plant," thanks to a wet spring which prevented many farmers completing sowing plans.
The Wasde was expected to cut the figure for harvested corn area by 1.0m acres to 88.1m acres, and for soybeans by some 450,000 acres to 75.9m acres.
'Soybean planting is now underway'
But as an extra comfort to supply hopes, planting prospects for Brazil improved with rains to refresh soils parched by the dry season.
Influential crop scout Michael Cordonnier said: "Many areas of central and south-central Brazil received their first good rains of the new growing season last week and over the weekend and as a result, soybean planting is now underway all across central Brazil including Mato Grosso," the top growing state.
"The forecast is calling for additional showers in the days ahead, so farmers will now go ahead and plant because they are confident enough that there will be ample soil moisture for germination and early plant growth."
'Good time for China to be buying'
Such considerations offset any hopes for demand, even from abroad, after a warning from Oil World that the void in USDA export sales data could be allowing importers to stock up in secret.
At RJ O'Brien, Richard Feltes said that it was a "good time for China to be buying corn and soy under the radar with USDA's daily reporting system unplugged".
Soybeans for November closed down 0.7% at $12.88 ¾ a bushel in Chicago, dropping back below 10-day and 50-day moving averages.
Corn for December ended down 1.7% at $4.41 ¾ a bushel, shifting back below its own 10-day moving average.
Corn's decline dragged on wheat too, even though Morocco received no bids in a tender for up to 373,333 tonnes of US soft wheat, a void which might exacerbate ideas of tight supplies.
"Wheat markets are mixed on spillover pressure from corn futures," was how CHS Hedging saw it.
Chicago wheat for December closed down 0.2% at $6.93 ½ a bushel.
Still, Kansas City hard red winter wheat, which has been the focus of market tightness concerns given a smaller than thought US harvest and resilient demand, added 0.5% to $7.60 ½ a bushel, the best close for a spot contract since May.
The technical chart has positive aspects too, with shorter-term moving averages shifting to move upwards through longer-term peers.