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The story
A sudden market plunge has become a hot topic among people investing through Japan’s New NISA tax-free investment program. On 5ch’s “Anything Goes Live” board (Nandemo Jikkyo G), posts ranged from investors treating the dip as a chance to buy more without cutting their regular contributions, to panicked users lining up outside banks before opening hours. Alongside optimistic takes calling it “a bonus round for buying cheap,” the thread also surfaced worries about security risks and concrete examples explaining why sticking with dollar-cost averaging still makes sense during a downturn — highlighting just how differently individual investors react to a falling market.
What people said
Why not just short it?
Exactly this.
Gives me a reason to keep grinding at work.
Re: #36
The S&P 500's been way overbought since last year.
I was planning to fill up my growth-investment allowance once it dropped, but it just won't budge.
Doesn't look like this one's turning into a real crash either.
Do you even know what's actually in the NISA funds you're holding? 😎
Guess GACKT was right all along (the musician famous for his confident investing/crypto takes).
That guy knows everything.
He called it right again — must be on a winning streak of hundreds by now.
When it comes to money, the guy really is a pro───
whether that's a good thing or not is a separate question.
That is scary.
Wonder if there's any kind of guarantee against that.
Can't stop crying and shaking😭
Hold on, are banks even open on Saturdays?
Calling it a "buying opportunity" like that kind of defeats the point of dollar-cost averaging, no?
Person A and Person B both decide to buy the same stock, investing ¥30,000 every month. The starting share price is ¥100.
In month 3, the price suddenly drops 20%.
Person B panics, thinking "This is bad if it keeps falling!" — stops investing and sells off the shares they already own.
Person A, meanwhile, stays calm and keeps up the monthly contributions.
After that, the price gradually recovers, and by month 6 it's back to ¥100.
So how did the two of them end up after 6 months?
Person B's case
• Amount invested: ¥90,000
• Sold when the price had dropped to ¥80
• Amount received from selling: ¥78,000
• Loss: –¥12,000
Person A's case
• Amount invested: ¥180,000
• Kept buying even while the price was low
• Price recovered to ¥100 by month 6
• Value of holdings: ¥202,500
• Profit: +¥22,500
Not sure what point you're making, but dollar-cost "averaging" is exactly what it says — you buy at a steady, even pace. It's not the same thing as loading up heavily whenever the price drops.
Sure, that works out great — as long as the price actually does go back up after 6 months.
Background and Key Points of This Discussion
The New NISA is a tax-advantaged investment program that launched in 2024, letting people invest up to ¥3.6 million a year combined across its “tsumitate” (regular installment) and “growth investment” allowances, with any investment gains exempt from tax. When the market drops, opinion typically splits between sticking with dollar-cost averaging — buying a fixed amount at regular intervals — and cashing out, and that same divide shows up clearly in this thread. The “Person A and Person B” example used in the thread is a hypothetical illustration meant only to explain how the mechanism works; no concrete figures were given for the actual size of this drop or what triggered the plunge. Whether buying more during a downturn ultimately pays off depends on the market actually recovering afterward — an assumption that isn’t guaranteed, and one that’s easy to overlook.
※This article is compiled and summarized from the 5ch (“Anything Goes Live” board) thread “NISA Crashes LOLOLOLOLOLOL.”
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