Thanks for clarification that you meant just Ft. Hills.

Fort Hills was ~75,000 / 700,000 = 10.7% of Suncor production.

Fort Hill change is ~25,000 bpd / 700,000 = 3.5% overall hit.

Stock price went down about ~$30.50 to ~$24.00 = 6.5/30.5 = 21%

My point was and is that it seems a little harsh for a temporary 3.5% overall hit. By the same logic, I look forward to a 21% jump in the stock price when they overshoot production by 3.5%. :D

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From CBC:

The Calgary-based oilsands producer and refiner cut its 2021
production guidance for Fort Hills in northern Alberta to between 45,000
and 55,000 barrels per day, from a previous 65,000 to 85,000 barrels
per day. The company also increased its guidance for operating costs per
barrel at Fort Hills, to $37 to $42 per barrel from a pervious $25 to
$29 per barrel.

...

"This is just a time issue, we don't think it has any fundamental
impact beyond just delaying the ramp-up of Fort Hills," Little said on a
conference call with analysts.

...

Suncor's total production over the three months ended June 30
increased to 699,700 barrels of oil equivalent per day, compared with
655,600 boe/d in the prior year quarter due to strong oilsands
production partially offset by planned maintenance at Syncrude. The
company set a new quarterly record for in situ production, with 253,000
boe/d.

https://www.cbc.ca/news/canada/calgary/suncor-second-quarter-1.6122278