Don't look now, but the Nasdaq once again hit an all-time high this month. That seemed very unlikely at the end of March with the index in correction territory, but leading tech and artificial intelligence (AI) stocks have come roaring back.

Google-parent Alphabet will invest up to $40 billion in Anthropic, as the tech giant deepens ​its partnership with the artificial intelligence startup that is also its rival ‌in the global AI race.