WALL STREET STOCKS/UAL INC <UAL> Takeover speculation continues to fuel heavy trading in UAL Inc, traders said. UAL rose 1-5/8 to 73-5/8 on volume of more than two mln shares, after trading with little upward movement earlier in the session. Traders said rumors, which began yesterday, added to speculation that the company would be the target of a takeover. They said it was believed Coniston Partners and the Pritzker family of Chicago were buying the stock. Coniston declined comment and the Pritzkers had no comment. Traders said there was speculation a bidder might appear, and also that real estate developer Donald Trump, who holds a stake in UAL, might participate in a takeover bid. UAL pilots said they would be willing to pay 4.5 billion dlrs, which includes debt, for the company's United Airlines unit.