Dear Dave,

My employer offers an employee stock purchase plan at a 15 per cent discount. I’m usually the kind of guy who buys stocks and holds on to them for ever. But when it comes to an opportunity like this, should I buy it and wait for a year to sell it, or should I buy it and sell right away?

– John

Dear John,

Generally, I don’t recommend buying single stocks at all. Single stocks are way too risky, and a 15 per cent discount is nothing special in this kind of scenario. Virtually every single company out there that has an employee stock option plan offers a 15 per cent discount.

In most situations like this, if you pull up a 52-week chart on the stock’s performance, you’ll find a variance of as much as 15 per cent in those 52 weeks. In other words, you could lose any or all of that discount in one move of the stock. Plus, it’s not like 15 per cent is a big discount to begin with.

Fifteen per cent off a single stock, considering how volatile they are, is no big deal. But hey, if you love your company that much, they have a great track record, and the stock has a good history, go ahead. Just don’t allow single stocks as a category to make up more than 10 per cent of your net worth.

The core issue here is a lack of diversification. When you put all your eggs in one basket, there’s always some clown twirling the basket.

The first time I ran into that was a long time ago with a lady who was 70 years old. She had worked for a large company for 40 years. On top of that, she invested all her retirement savings, all her wealth – $800,000 total – in that one company.

Well, this company experienced a crisis. It lost nearly half of its value, and her $800,000 was suddenly worth about $400,000. She left herself vulnerable with a high-risk play, John.

I’ll say it again. Don’t bet the farm on one horse, and don’t have more than 10 per cent of your net worth wrapped up in single stocks. Hundreds of research projects have been done that show individuals who buy individual stocks and think they know what they’re doing actually lose money much more often than they make money.

– Dave

• Dave Ramsey is an eight-time national bestselling author, personal finance expert and host of “The Ramsey Show.” He has appeared on “Good Morning America,” “CBS This Morning,” “Today,” Fox News, CNN, Fox Business and many more. Since 1992, Dave has helped people regain control of their money, build wealth, and enhance their lives. He also serves as CEO of Ramsey Solutions