Senba Sensing Technology Co.,Ltd. (SZSE:300701) shareholders would be excited to see that the share price has had a great month, posting a 31% gain and recovering from prior weakness. But the gains over the last month weren't enough to make shareholders whole, as the share price is still down 4.1% in the last twelve months.

Following the firm bounce in price, Senba Sensing TechnologyLtd's price-to-earnings (or "P/E") ratio of 51.8x might make it look like a strong sell right now compared to the market in China, where around half of the companies have P/E ratios below 31x and even P/E's below 18x are quite common. However, the P/E might be quite high for a reason and it requires further investigation to determine if it's justified.

Senba Sensing TechnologyLtd has been doing a good job lately as it's been growing earnings at a solid pace. One possibility is that the P/E is high because investors think this respectable earnings growth will be enough to outperform the broader market in the near future. If not, then existing shareholders may be a little nervous about the viability of the share price.

How Is Senba Sensing TechnologyLtd's Growth Trending?

Senba Sensing TechnologyLtd's P/E ratio would be typical for a company that's expected to deliver very strong growth, and importantly, perform much better than the market.

Retrospectively, the last year delivered a decent 12% gain to the company's bottom line. However, this wasn't enough as the latest three year period has seen an unpleasant 67% overall drop in EPS. So unfortunately, we have to acknowledge that the company has not done a great job of growing earnings over that time.

Weighing that medium-term earnings trajectory against the broader market's one-year forecast for expansion of 37% shows it's an unpleasant look.

With this information, we find it concerning that Senba Sensing TechnologyLtd is trading at a P/E higher than the market. Apparently many investors in the company are way more bullish than recent times would indicate and aren't willing to let go of their stock at any price. There's a very good chance existing shareholders are setting themselves up for future disappointment if the P/E falls to levels more in line with the recent negative growth rates.

The Final Word

The strong share price surge has got Senba Sensing TechnologyLtd's P/E rushing to great heights as well. We'd say the price-to-earnings ratio's power isn't primarily as a valuation instrument but rather to gauge current investor sentiment and future expectations.

We've established that Senba Sensing TechnologyLtd currently trades on a much higher than expected P/E since its recent earnings have been in decline over the medium-term. When we see earnings heading backwards and underperforming the market forecasts, we suspect the share price is at risk of declining, sending the high P/E lower. If recent medium-term earnings trends continue, it will place shareholders' investments at significant risk and potential investors in danger of paying an excessive premium.

Before you settle on your opinion, we've discovered 3 warning signs for Senba Sensing TechnologyLtd (1 is significant!) that you should be aware of.

Of course, you might find a fantastic investment by looking at a few good candidates. So take a peek at this free list of companies with a strong growth track record, trading on a low P/E.

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