I'm a long-term holder in an ASX-listed semiconductor company that's been working on ReRAM for a number of years. Said company is now at the stage where there is talk of "corporate transactions" viz. licensing agreements or possibly even a takeover bid.
In anticipation of the quarterly report due out at the end of January, this stonk went up by 50% in just under two weeks. As soon as the quarterly came out - which was a very positive quarterly suggesting that certain milestones had been met, and that the next stage of development was being fast tracked - the price fell by up to 20% during the day's trade, closing at 10% below the open.
The amount of REEEEEEing going on in this forum as a result was fucking ridiculous. Anyone that's been around stonks for longer than 5 minutes knows that there is a cohort of investors that live by the Not Financial Advice of "buy the rumour, sell the news". This is exactly what happened.
Many of the buyers piling in over the previous fortnight were already planning to GTFO and take their winnings as soon as the announcement came out, irrespective of what it said (good, bad or indifferent).
It's great that WSB has encouraged so many folks to take a long hard look at the markets, but FFS do a tiny bit of research before shooting your mouths off. Jebus.