Beside net cash (adventured already commented), also flow itself is correlated to availability of cash. More people desiring to enter the market = more buyers.

Beside net cash (adventured already commented), also flow itself is correlated to availability of cash. More people desiring to enter the market = more buyers. And, my personal opinion, more "less-skilled" people entering the market = even easier to raise prices (exactly like in street markets with tourists vs locals).