Answer:
standardized good, full information, no transactions costs, participants are price takers.
Step-by-step explanation:
Perfectly competitive markets are theoretical, because even commodities' markets (e.g. corn, oil, etc.) do not comply 100% with all the characteristics of a perfectly competitive market, but are close enough to consider them as such.
The 5 characteristics of perfectly competitive markets are:
- Many participants (many buyers and sellers)
- Standardized goods or services
- Zero transaction costs
- No barriers to entry
- All participants can access perfect information
As I said before, no market complies 100% with these requirements, but some commodities' markets get close enough, but even there:
- commodity traders charge a transaction fee
- capital is a great barrier to entry that cannot be eliminated, e.g. it costs millions to drill and sell oil
- not all participants will be able to access perfect information