Generally speaking long term investing is the way to go. But that doesn't mean long term investors can avoid big losses. Zooming in on an example, the Coastal Greenland Limited (HKG:1124) share price dropped 62% in the last half decade. That's not a lot of fun for true believers. We also note that the stock has performed poorly over the last year, with the share price down 55%. Furthermore, it's down 50% in about a quarter. That's not much fun for holders.

Check out our latest analysis for Coastal Greenland

To quote Buffett, 'Ships will sail around the world but the Flat Earth Society will flourish. There will continue to be wide discrepancies between price and value in the marketplace...' One imperfect but simple way to consider how the market perception of a company has shifted is to compare the change in the earnings per share (EPS) with the share price movement.

During five years of share price growth, Coastal Greenland moved from a loss to profitability. Most would consider that to be a good thing, so it's counter-intuitive to see the share price declining. Other metrics may better explain the share price move.

It could be that the revenue decline of 23% per year is viewed as evidence that Coastal Greenland is shrinking. This has probably encouraged some shareholders to sell down the stock.

The graphic below depicts how earnings and revenue have changed over time (unveil the exact values by clicking on the image).

We like that insiders have been buying shares in the last twelve months. Having said that, most people consider earnings and revenue growth trends to be a more meaningful guide to the business. Dive deeper into the earnings by checking this interactive graph of Coastal Greenland's earnings, revenue and cash flow.

A Different Perspective

Coastal Greenland shareholders are down 55% for the year, but the market itself is up 2.3%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Regrettably, last year's performance caps off a bad run, with the shareholders facing a total loss of 18% per year over five years. We realise that Buffett has said investors should 'buy when there is blood on the streets', but we caution that investors should first be sure they are buying a high quality businesses. It is all well and good that insiders have been buying shares, but we suggest you check here to see what price insiders were buying at.

Coastal Greenland 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 HK exchanges.

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material.

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned. Thank you for reading.