Oh, that percentage is the year on year change, not a return on investment. So 2025 financial year they reported roughly -30 million cash from investments, this year is roughly -267 million, so they reported a loss of (267-30) / 30 = ~7.78 times as much money against the scope of the category "investments".

You'd expect to see the percentage go below zero when you buy more stocks / bonds or securities than you sell or which mature, or (I think) when you take money gained from an investment and then put it towards another investment or other cash category, so it's not necessarily a really bad thing for a company to have a negative number there. It just means they're either shuffling it internally or committed to spending it. The size and timing of the change is what is unusual.

There are all sorts of rules and tricks in this shell game though, I couldn't say with any certainty where that money went, or if it ever really existed at all. I just see a pattern of companies with big negative short term investment cash flows and layoffs that correlate maybe too well with the Bitcoin dump at the end of January.