A new competitor entering a market that a business is in can lead to uncertainty over the number of customers that the original business will have in the future
A shortage in a raw material can lead to uncertainty for a business that needs it, as their suppliers might change their prices, which will affect the business's costs
A change in government may lead to uncertainty over the availability of government spending in the future
The decision of a country to leave a trade agreement with another country could lead to uncertainty over future exchange rates
Changes to business or employment legislation by the government can lead to uncertainty over exactly how the legislation will affect things like customers, sales and profits when the legislation comes into effect