MAI Basic Four Inc. said Tuesday that...

MAI Basic Four Inc. said Tuesday that it is unaware of any corporate development that would explain a recent rise in its stock price. MAI’s stock has risen by 35% this week in active trading on the New York Stock Exchange. The company’s shares closed Tuesday at $5.75 per share, up 75 cents. The stock also rose 75 cents on Monday, closing at $5. The Tustin computer maker made its announcement Tuesday in response to a request by the New York Stock Exchange.