Stocks vs bonds: how the mix shifts with age
One choice shapes your investing more than which fund you pick: how much sits in shares versus bonds. And the honest answer to ‘what mix?’ is less about your age than most charts pretend.
Two jobs: growth and ballast
A portfolio usually mixes two ingredients doing two jobs. Shares (equities) are the growth engine — they tend to grow the most over long periods, but with the biggest How much the price swings year to year — lower is calmer. More → along the way. Bonds are the ballast — calmer, steadier, and often holding up when shares fall. The proportion between them is the main dial: more shares means more expected growth and a rougher ride; more bonds means a smoother ride and, usually, less long-run growth.
Why time horizon beats age
The question that really drives the mix isn’t ‘how old are you?’ but ‘when will you need this money?’. A long runway can ride out a market fall and wait for the recovery, so it can carry more shares. Money you’ll need in a year or two can’t afford a big dip at the wrong moment, so it leans safer. That’s why a 25-year-old saving for retirement and a 25-year-old saving for a house next spring sit at opposite ends — same age, completely different mix.
The ‘glide path’ idea
A common pattern is to hold mostly shares while the goal is distant and gradually shift toward bonds as it approaches — taking chips off the table so a late crash can’t derail things just before you need the cash. This is called de-risking or a glide path. You’ll meet rules of thumb like ‘hold (110 minus your age)% in shares’. Treat them as a rough conversation-starter, not a law: they ignore your actual goals, other savings and how you sleep during a crash.
You don’t have to steer it by hand
If the whole thing sounds like a lot to manage, it needn’t be. ‘Target-date’ and all-in-one funds hold a share/bond mix and shift it toward safety over time for you, automatically. Or you can hold a fixed blend and simply rebalance back to it now and then. Which route fits comes down to your timeframe and temperament, not the number of candles on your cake — this is background, not a recommendation of any particular split.