Is it wise to rebalance your stocks portfolio if a stock rises very significantly such that it becomes a majority of your holdings ?

I'm personally a dividend investor and hence I don't have a "sell" button on my holdings unless the fundamentals of the company changes drastically.

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When I purchase a stock i typically divide them into 2 categories: 1 without a sell button, which are mostly for my dividend income, and 1 with an (adjustable) target price - the latter being more of a trade than an investment. For the latter, I do cash out on my capital at times so that I don't incur any losses should price take a dive, though that would also mean i'm reducing my potential profits which i'm okay with.

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Hope it helps with a different perspective!

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As someone who has managed portfolios through both bull and bear markets, I understand the emotional challenge you're facing. It's the classic investor's dilemma: do you stick to your original strategy or let your winners run? Let me share my perspective.

There's a common misconception that rebalancing means "giving up" on potential gains. In reality, it's about risk management. Think of it this way: if a single stock dominates your portfolio and that company faces a major setback (regulatory issues, leadership changes, earnings miss), your entire portfolio becomes vulnerable. The concentration risk may not feel dangerous during good times, but it can be devastating during market downturns.

Here's my practical approach to rebalancing when individual positions grow significantly:

1. Set clear trigger points - I generally recommend rebalancing when any single stock position exceeds 15-20% of the portfolio's value
2. Use a gradual approach - Consider selling in tranches over 2-3 months rather than all at once
3. Maintain some upside exposure - You don't need to sell back to your original small position; if you have strong conviction in the company, maintain a slightly larger allocation
4. Consider tax implications - Time your sales to minimize tax impact when possible
5. Document your reasoning - Write down why you're rebalancing to stay accountable to your strategy

Remember, the goal of diversification isn't to maximize returns - it's to optimize your risk-adjusted returns over the long term. By maintaining appropriate position sizes, you're protecting yourself from both market and emotional risks.

A balanced portfolio may not make for exciting dinner party conversation, but it helps you sleep better at night and stay invested through market cycles. That's what builds real wealth over time.

Want more practical portfolio management tips and insights from my 15+ years of experience? Follow me on Instagram @ngooooied where I regularly share case studies and strategies from my wealth management practice.

Regards, Ngooi Zhi Cheng Senior Portfolio Manager ChFC

If one stock has blown up and is now taking up way more of your portfolio than you’re comfortable with, it might be a good idea to rebalance. Helps reduce risk and brings things back in line with your plan. That said, if the stock still has strong fundamentals, selling too much might mean missing out on more gains. Maybe consider selling a portion to lock in some profits and put that back into your index funds to maintain balance. You still get to enjoy some upside while keeping your portfolio diversified. Best of both worlds, really!

If I was holding it for income, then I probably just hold and not buy more. If the relative size shrinks over time, then I may hope for the stock price to go down again and buy more later.

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If I was holding for growth I would probably sell to lock in profits. It would be a subjective calculation on whether remaining potential upside outweighs potential downside over my projected investment horizon.