Two unions representing about 3,400 Canadian Pacific workers formally served 72-hour strike notice, with engineers, conductors and signal workers set to walk out at 12:01 a.m. Saturday without a settlement.
The railway is under pressure to clear a grain backlog and supply locomotives to the oil industry. A Western Canadian wheat official said farmers relying on CP could face unpaid deliveries.
A strike would halt grain movement from the Prairies at the start of planting, tightening export supplies and delaying farm cash flow. Rail constraints already limit Canadian grain and oilseed deliveries.
After 283 past bullish logistics events, Wheat (SRW) moved a median -0.2% over 5 sessions (46% higher; middle half -1.4% to +1.3%), and -0.1% over 20.
Not enough comparable past events yet for a historical read.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.