1-1 What Does Investing Actually Involve?
A page for sorting out the jobs your money has, and your goals for purpose, timeframe, and amount, before you pick any product
When people start thinking about investing, most jump straight to picking a product — "what should I buy right now?". But the first thing to look at, if you want a portfolio that actually fits you, is not a specific product. Start with the conditions: when will you use this money, how much of a fall would genuinely hurt, and how much are you trying to grow it to. Settle that foundation first and the products you need will surface on their own from the thousands out there.
- What you decide first is
purpose,deadline, anda target amount— not a product. - Split your money into
an emergency fund,money you need soon, andmoney you grow long term. - Once the job and the timeframe are set, you can see which products are candidates and which to leave out.
- Even for the same product, how much of it you hold changes how the whole portfolio moves.
1. Before picking products, change the order you decide in
A common start is to buy whatever you see most on social media or at the top of a ranking — an S&P 500 fund, a global equity fund. As a way to get going that is not bad, but in this order, what you are holding it for goes fuzzy as soon as the price drops, and the decision to hold or sell ends up following how you feel that day.
What matters is deciding the job each pot of money has, and your purpose first. Ask "which products fit those conditions?" after that, and your choices stop wobbling.
2. Split your money into three jobs
Rather than treating your money as one lump, group it by when and why you will use it. A different kind of product suits each job.
1. Emergency fund
Start by securing an emergency fund for the unexpected — the money that protects you through sudden illness or job loss. What matters most here is not yield but being able to withdraw it at any time with the principal intact. An ordinary savings account is usually the most reassuring place for it.
2. Money you need soon
Next, set aside money you need soon — funds already earmarked for something within a few years, such as a house deposit or school fees. If the balance has fallen by the time you need it, your plan breaks, so there is no need to reach for risk. Time deposits, government bonds, or relatively stable corporate bonds suit money that must be protected.
3. Money you grow long term
Finally, anything you will not touch for ten or twenty years is money you grow long term — retirement savings being the classic case. This is the money investing is really about. Because the whole premise is growing it slowly over a long period, you can accept some price movement and reach for return with mutual funds, equities, ETFs, or REITs.
You do not have to get the split perfect from the start. What matters is not putting your near-term living costs or money you need in a few years into investments. Invest only "money you have no plans for" in things like equities. Drawing that line is the first step.
3. Match the product to the job
Once the job and the goal are visible, the field of products narrows a lot. For a house deposit you need in three years, not losing it matters more than growing it — so deposits or government bonds are a more natural fit than equities. For retirement money more than twenty years out, equities and mutual funds become easy candidates even with movement along the way.
The last thing to look at is not only what you hold but how much of it. Holding ¥200,000 of a ¥1,000,000 pot in equities and holding ¥800,000 in equities produce very different swings for the portfolio as a whole. Once you can see which money you are investing and for how long, the next step is looking at the return and risk of each product.