J Sainsbury’s (LSE: SBRY) is down substantially from its 24 February one-year traded high of £3.61. I think this is largely due to a broader cooling in UK retail sentiment rather than anything company specific.

Indeed, despite retail data coming in softer across the March-April period, Sainsbury’s released another set of solid full-year results.

In practical investing terms, this disparity has widened the gap between the stock’s price and its real worth (‘fair value’). And because asset prices (including shares) tend to converge to this value over time, this could be a great opportunity for long-term investors.

So how big is this gap?

Where should the shares be trading?