Teradyne Inc. /zigman2/quotes/208321188/composite TER +0.88% shares rallied in the extended session Wednesday after the electronic testing equipment maker's results and outlook topped Wall Street estimates. Teradyne shares rallied 9.5% after hours, following a 2.9% rise in the regular session to close at $73.59. The company reported fourth-quarter net income of $136.8 million, or 75 cents a share, compared with $143.8 million, or 79 cents a share, in the year-ago period. Adjusted earnings were 88 cents a share, compared with 63 cents a share in the year-ago quarter. Revenue rose to $654.7 million from $519.6 million in the year-ago quarter. Analysts surveyed by FactSet had forecast earnings of 79 cents on revenue of $611.7 million. Teradyne expects first-quarter adjusted earnings of 86 cents to 96 cents a share on revenue of $670 million to $710 million, while analysts had forecast earnings of 64 cents a share on revenue of $560.4 million. The company also said its board hiked the March 20-payable quarterly dividend 11% to 10 cents a share and approved a buyback of up to $1 billion in shares, of which a minimum of $250 million will be bought back in 2020.