If you pick stocks with the correct weight to track the index, you're effectively running an index fund. And so you don't have to rebalance to keep tracking the index.

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jimmydorry an hour ago | parent | next [-]

Indexes rebalance frequently. The "correct weight" today, won't be the correct weight in a year.

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pid-1 an hour ago | parent | prev | next [-]

1 If you never rebalance, you're never adding new stocks to the index, nor removing stocks that do not belong to it anymore.

2 You need to rebalance to take corporate events into account: new stocks, buybacks, dividends, etc...

	▲	yorwba 31 minutes ago \| parent [-]
		You can add stocks whenever you put money in. Whether that's because you got your paycheck or a dividend or some other income is kind of irrelevant. And you can remove stocks when you take money out. But you probably shouldn't start selling one stock to buy another just because their prices moved, unless you have information that lets you time the market.

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an hour ago | parent | prev | next [-]

[deleted]

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UncleDiaz12 an hour ago | parent | prev [-]

What are you talking about? Those index fund are constantly rebalancing. This is why you buy an index fund, so you don’t have to constantly rebalance your portfolio.