I wonder if there's some speculative buying based on the mystery Berkshire Hathaway stake, rumored to be disclosed this weekend.
I've heard the rumor they took a stake, but why would it be disclosed this weekend? Is there a source for that?
If the stake an entity has in a public company rises above 5% during a calendar year, that must be disclosed in a 13G filing within 45 days after the end of that year. More broadly, an investment manager with more than $100 million in assets, must file a 13F to disclose its holdings within 45 days after the end of each quarter.
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