Appetite for Beyond Meat's plant-based burgers is shaky. But traders sure seem to developed a taste for its stock.

Shares in the company have soared about 1,000% over four days - a stunning rally for a company that had seen its share price all but wiped out since it debuted on the stock exchange six years ago.

The business has been struggling with sluggish sales - and has not posted a quarterly profit in more than five years - as shoppers turn away from its meat alternatives.

The surge has reignited debate whether the activity, propelled in part by online enthusiasm among everyday investors, is a sign of an overly frothy stock market.

Momentum started to build last week, when a Reddit user helped fuel a wave of purchases, drawing comparisons to other rallies of so-called meme stocks such as GameStop and AMC.