SAN FRANCISCO :Chip technology provider Arm Holdings gave a fiscal third-quarter forecast on Wednesday that topped Wall Street's expectations, boosted by the boom in artificial intelligence computing. Shares of Arm rallied 5 per cent immediately after the report but retraced most of those gains within minutes and up a little less than 2 per cent. For the current fiscal quarter, Arm forecast revenue of $1.23 billion at the midpoint of its guidance, which exceeded the average analyst estimate of $