Stored it for three days twice while riding a roller coaster—are you still chasing the rally and panic-selling?

After looking at the storage sector again, I couldn’t help but smile and think about what we experienced in US stocks this week—let’s review.
Last Sunday night, SK Hynix’s Korean shares crashed 15%, triggering a circuit breaker; before the US market opened, storage names all collapsed, and a bunch of people cut their losses in the group chat.
Early Tuesday morning, CPI at 3.5% came in far below expectations; IBM plunged 25% and said plainly that customer budgets were shifting toward hardware. Storage turned around and rallied instead—Hynix’s ADR surged 27% in a single day, and it topped the most-active trading volume list.
Wednesday night, SemiAnalysis released 《Stay Greedy When Others Are Afraid》, going directly bullish on Hynix; with the bullish catalyst, it pulled another wave up.
Early Thursday, storage slumped again fast—Hynix closed down 8%, SanDisk fell 11%, Micron dropped 7%, and Seagate Western Digital slid 8%. Four days, two roller coasters: it rose and then fell, fell and then rose.
I don’t want to give a “Monday-morning quarterback” speech about how accurate my call was. What I want to say is: if you participated in this four-day rally-chase and sell-off cycle from start to finish, your account is very likely in the red.
Storage isn’t something you can’t hold—it’s something you can’t chase.
In this AI storage cycle, it’s not about making the right directional bet. It’s about keeping your own rhythm while riding the roller coaster.
Everyone got the direction right—the demand for AI hardware is rock-solid. But being right on direction doesn’t mean your actions are right.
What did I do this week? Nothing. I’ve kept holding the DRAM ETF without moving, and I didn’t add any shares. I’ve kept 20% cash in my hands the whole time—neither getting carried away by Tuesday’s rebound, nor trying to add today when prices pulled back.
This “do nothing” looks stupid, but it’s actually the most expensive thing I earned in the past half year.