野村AI公司70（Nomura AI Companies 70）是一只等权重指数，由70只因人工智能相关业务而被媒体报道的公司股票构成。成分股从日本各证券交易所上市的全部普通股中筛选，依据对电视新闻、杂志、报纸及其他媒体文章/报告的搜索结果，构建量化估值指标进行选样，检索关键词为「人工智能」及若干借助AI选出的相关关键词。该指数采用等权重设计，使大盘股与中小盘人工智能相关股票获得同等投资权重；出于可投资性考虑，剔除市值过小、流动性过低的股票。成分股及用于检索的AI相关关键词每年各重构一次：定期调整在每年12月的首个营业日实施，调整基准日为调整日前两个月的15日；分数计算范围为选股范围中过去60日平均成交额排名前90%的股票。指数基日为2001年11月30日，基值为10000点，自2017年1月18日起发布指数值。
The Nomura AI Companies 70 is an equally weighted index made up of 70 stocks of companies covered by the media in connection with business related to artificial intelligence. Stocks for inclusion in the index are selected from all common stocks listed on exchanges in Japan with quantitative valuation indicators based on the results of searches for articles/reports from TV news, magazines, newspapers, and other media. "Artificial intelligence" and several related keywords selected with the use of AI are employed in the search for articles. By making it an equally weighted index, a flat rate of investment is made in not only large cap but also small cap artificial intelligence-related stocks. Stocks with excessively small market caps and low liquidity are excluded from consideration in view of investability. Constituent stocks and AI-related keywords used to search for articles are each reconstituted once a year. The base date is 30 November 2001, the base value is 10,000, and publicatio