play the market (?.)

• be caught short
• be short
• belong
• bucket
• bucketshop
• deposit margin
• go long
• hold on
• make a killing
• make a scoop
• margin up
• miss the market
• operate
• overstay the market
• plunge
• pyramid
• scalp
• scoop the market
• speculate
• stag
• stag the market
• take a flier
• trade on margin
• venture