If you want to compound wealth in the stock market, you can do so by buying an index fund. But in our experience, buying the right stocks can give your wealth a significant boost. For example, the White Mountains Insurance Group, Ltd. (NYSE:WTM) share price is 90% higher than it was five years ago, which is more than the market average. It's also good to see a healthy gain of 29% in the last year.

So let's assess the underlying fundamentals over the last 5 years and see if they've moved in lock-step with shareholder returns.

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. By comparing earnings per share (EPS) and share price changes over time, we can get a feel for how investor attitudes to a company have morphed over time.

During five years of share price growth, White Mountains Insurance Group achieved compound earnings per share (EPS) growth of 28% per year. The EPS growth is more impressive than the yearly share price gain of 14% over the same period. So one could conclude that the broader market has become more cautious towards the stock. The reasonably low P/E ratio of 8.39 also suggests market apprehension.

The image below shows how EPS has tracked over time (if you click on the image you can see greater detail).

We consider it positive that insiders have made significant purchases in the last year. Having said that, most people consider earnings and revenue growth trends to be a more meaningful guide to the business. It might be well worthwhile taking a look at our free report on White Mountains Insurance Group's earnings, revenue and cash flow.

A Different Perspective

White Mountains Insurance Group provided a TSR of 29% over the year (including dividends). That's fairly close to the broader market return. That gain looks pretty satisfying, and it is even better than the five-year TSR of 14% per year. Even if the share price growth slows down from here, there's a good chance that this is business worth watching in the long term. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. Even so, be aware that White Mountains Insurance Group is showing 1 warning sign in our investment analysis , you should know about...

White Mountains Insurance Group is not the only stock insiders are buying. So take a peek at this free list of growing companies with insider buying.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on American exchanges.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.