Alice, Bob, Chris and Delta are traders in the futures market. The following trades occur over a single day in a newly-opened equity index future that matures in one year which the exchange just made available.
1. Alice buys a future from Bob.
2. Chris buys a future from Delta.
3. Bob buys a future from Chris.
These were the only trades made in this equity index future. What was the trading volume and what is the open interest?