This episode's headline: Stock Surge: A Good Indicator?; Carl Icahn: Takeover Titan; Northern Ireland: Protestants Protest; Ralph Nader: Consuming Zeal. The guests include In New York: ROBERT STOVALL, Stock Market Analyst; RALPH NADER, Consumer Activist; Reports from NewsHour Correspondents: JUNE MASSELL, in New York; ANNE TYERMANN, in Northern Ireland; JUNE CROSS. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JUDY WOODRUFF, Correspondent