Auction Technology Group plc's (LON:ATG) stock was strong after they recently reported robust earnings. However, our analysis suggests that shareholders may be missing some factors that indicate the earnings result was not as good as it looked.

Check out our latest analysis for Auction Technology Group

Auction Technology Group reported a tax benefit of US$5.8m, which is well worth noting. This is meaningful because companies usually pay tax rather than receive tax benefits. Of course, prima facie it's great to receive a tax benefit. However, the devil in the detail is that these kind of benefits only impact in the year they are booked, and are often one-off in nature. In the likely event the tax benefit is not repeated, we'd expect to see its statutory profit levels drop, at least in the absence of strong growth. So while we think it's great to receive a tax benefit, it does tend to imply an increased risk that the statutory profit overstates the sustainable earnings power of the business.

That might leave you wondering what analysts are forecasting in terms of future profitability. Luckily, you can click here to see an interactive graph depicting future profitability, based on their estimates.

Auction Technology Group reported that it received a tax benefit, rather than paid tax, in its last report. As a result we don't think its profit result, which includes that tax-boost, is a good guide to its sustainable profit levels. Because of this, we think that it may be that Auction Technology Group's statutory profits are better than its underlying earnings power. But at least holders can take some solace from the 17% EPS growth in the last year. Of course, we've only just scratched the surface when it comes to analysing its earnings; one could also consider margins, forecast growth, and return on investment, among other factors. Ultimately, this article has formed an opinion based on historical data. However, it can also be great to think about what analysts are forecasting for the future. Luckily, you can check out what analysts are forecasting by clicking here.

This note has only looked at a single factor that sheds light on the nature of Auction Technology Group's profit. But there are plenty of other ways to inform your opinion of a company. Some people consider a high return on equity to be a good sign of a quality business. While it might take a little research on your behalf, you may find this free collection of companies boasting high return on equity, or this list of stocks with significant insider holdings to be useful.