✓ Accepted Answer
Compound interest is money earning interest on itself. Here's why it matters so much: if you invest £1,000 at 7% annual return, after year 1 you have £1,070. Year 2 you earn 7% on £1,070, not the original £1,000. Over 30 years, £1,000 becomes £7,612 without adding another penny.
The key variables are rate of return, time, and frequency of compounding. Time is the most important. Starting at 25 versus 35 can double your retirement pot because you get an extra decade of compounding.
This is why the advice "start investing as early as possible" is so powerful. Even small amounts invested young beat large amounts invested late. A 22-year-old investing £100/month beats a 32-year-old investing £200/month in terms of final wealth, all else equal.
Debt compounds against you the same way. This is why credit card debt at 20% interest is so destructive — the balance grows rapidly if you only make minimum payments.
by sunitaagarwal8603
The best starting point for investing $1000 is an index fund that tracks the S&P 500. Instead of trying to pick winning stocks (which even professional fund managers rarely do consistently), you buy a tiny slice of 500 of the largest US companies in one purchase.
Vanguard, Fidelity, and Charles Schwab all offer excellent low-cost index funds. Look for funds with an expense ratio below 0.1%. Fidelity's FZROX has 0% fees.
Before investing anything, make sure you have 1-3 months of living expenses saved as an emergency fund in a high-yield savings account. Investing money you might need in 6 months is risky because markets can drop 20-30% and you'd be forced to sell at a loss.
If your employer offers a 401k match, contribute enough to get the full match first — it's a guaranteed 50-100% return that no investment can beat. Then open a Roth IRA (US) or ISA (UK) for tax-advantaged growth.
by sophiehall4075