US Cash Grains-Corn basis flat at elevators, merchants assess weather

Vaisala Oyj

07/08/2026 21:30

CHICAGO, Aug 7 (Reuters) - Spot basis bids were steady for corn at grain elevators in the U.S. Midwest and mixed at river terminals on Friday as farmers and merchants assessed the impact of weather on yield potential.
The U.S. Department of Agriculture is scheduled to update its corn and soybean production estimates in a monthly report on Wednesday.
The agency is expected to trim its corn yield estimate to 182.4 bushels per acre from 183 bushels in July and its soybean yield estimate to 52.9 bushels per acre from 53 bushels last month, according to a Reuters survey of analysts.
Hot, dry weather likely hurt corn yield prospects in July, the key month for development of the crop, analysts said. However, weather forecasts pose limited risks for soybeans into mid-August, the key month for determining the size of the soy crop, an analyst said.
More rain is expected along with near-normal temperatures, forecaster Vaisala said in a note.
Grain merchants said they will also assess the USDA's estimates for crop acreage on Wednesday.
On Monday, the agency is slated to issue a weekly update on corn and soybean crop condition ratings.
Basis values are quoted against CBOT futures in cents/bu:

Current



Previous



Bid



Bid



Chicago, Illinois








Corn processors 
+15
+
U

+15
+
U
UNC
Corn elevators
+10
+
U

+10
+
U
UNC
Soybean elevators
-20
+
Q

-20
+
Q
UNC
Wheat elevators
-20
+
U

-20
+
U
UNC
Wheat processors
-5
+
U

-5
+
U
UNC
Decatur IL corn
+13
+
U

+13
+
U
UNC
Decatur IL soybeans
+35
+
X

+35
+
X
UNC
Burns Harbor IN corn
UNQ



UNQ


UNC
Burns Harbor IN soy
UNQ



UNQ


UNC
Lafayette IN soy
+30
+
X

+30
+
X
UNC
Toledo OH (port)








Corn
+15
+
U

+15
+
U
UNC
Soy
-40
+
X

-40
+
X
UNC
SRW wheat
-12
+
U

-12
+
U
UNC
Davenport IA (river)








Corn
-34
+
U

-32
+
U
DN 2
Soy
-38
+
X

-38
+
X
UNC
Evansville IN (rail)








15-car CSX corn
+24
+
U

+24
+
U
UNC
Cincinnati OH (rail)








3-car corn
UNQ



UNQ


UNC
Hereford TX corn
+120
+
U

+120
+
U
UNC
Columbus OH (rail)








3-car corn
+34
+
U

+34
+
U
UNC
Morris IL (river)








Corn
-14
+
U

-17
+
U
UP 3
Soybeans
-8
+
X

-8
+
X
UNC
Fort Worth TX corn
UNQ



UNQ


UNC
Blair NE corn
-8
+
U

-8
+
U
UNC
Council Bluffs, IA (elevator)








Corn
-12
+
U

-12
+
U
UNC
Soy
-15
+
X

-15
+
X
UNC
Des Moines IA soy
+5
+
X

-5
+
X
UP 10
Sioux City IA soy
+60
+
X

+60
+
X
UNC
NOTE: 0 = Option Price, UNC = Unchanged, UNQ = Unquoted, NC = Not Comparable, DP = Delayed Price, N/A = Not Available, F = January, H = March, K = May, N = July, Q = August, U = September, X = November, Z = December
---------------------------------------------------------
     LINKS: 0#USCSHGRN-AM
      For U.S. forward basis spreadsheets, please click on:
     CORN/BASIS, SOYA/BASIS, WHEAT/BASIS, MILO/BASIS
     
- CBOT corn report COR/
- CBOT soybean report SOY/C
- CBOT wheat report WHE/C
- U.S. grain barge freight values BG/US
- U.S. Midwest cash grain AM GRA/M
- U.S. CIF/FOB Gulf Grain GRA/F

 (Reporting by Tom Polansek; Editing by Mark Porter)
 ((Thomas.Polansek@thomsonreuters.com))