id	keyword
ajfa-1990	futures
ajfa-1990	spot
ajfa-1990	trading
ajfa-1990	market
ajfa-1990	volatility
ajfa-1990	futures trading
ajfa-1990	price
ajfa-1990	journal
ajfa-1990	spot market
ajfa-1990	volume
ajfa-1990	futures market
ajfa-1990	spot volatility
ajfa-1990	commodities
ajfa-1990	commodity
ajfa-1990	market volatility
ajfa-1990	effect