As a result of flash crashes, the SEC is trying circuit breakers that will halt trading for 5 minutes if large stocks' prices change by more than in a 5-minute period. (We have seen this in action the last few weeks!)

10%

Explanation:

Circuit breakers are regulatory measures used to temporarily halt trading of stocks exchange, they are in place to halt trading as a result of flash crashes.

As a result of flash crashes, the SEC is trying circuit breakers that will halt trading for 5 minutes if large stocks' prices change by more than 10% in a 5-minute period.

answer; (c) canada,mexico and the united states. i do believe this is the correct answer; /// good luck

answer; rapid growth in buyer demand and high buyer switching cost;