Economical emergency can affect share market ?

 Yes !!!!

there is too many chances to affect but not at all.

Like Covid crises is one of most recent thing that affect peoples and their salary, jobs and finance and their leaving areas.

and so many peoples are leave their jobs or they are removed from their current position or even from their job also they trying to move back to their village from that pandemic it was worst ever for all types of peoples.

From their own expanses the could't try to invest in other things because the salary source is closed in Covid lockdown the only thing peoples doing is youtube, TV, leave tradition old and like these even some of peoples are on youtube and they making money but it is't a cup of tea for all peoples   

A small emergency could be become crises 

The Coronavirus pandemic has had a snowballing effect on all sectors. We’ve witnessed negative oil futures prices because of storage issues. Earlier in March 2020, fears of recession sent stock indices lower.

While global markets got highly volatile beginning March, it is the stock market crash in 2020 on March 9 that will be remembered as the worst Monday. 

These are some prof of affect by the pandemic.

It is a recent example 

and even enter to borders by terrorists will also could be affected.

also controversy can also affect their is many emergency that affect share market.