Simply click below to discover how you can take advantage of this. Manika Premsingh | Tuesday, 2nd March, 2021 Image source: Getty Images. Don’t miss our special stock presentation.It contains details of a UK-listed company our Motley Fool UK analysts are extremely enthusiastic about.They think it’s offering an incredible opportunity to grow your wealth over the long term – at its current price – regardless of what happens in the wider market.That’s why they’re referring to it as the FTSE’s ‘double agent’.Because they believe it’s working both with the market… And against it.To find out why we think you should add it to your portfolio today… Enter Your Email Address The end of the pandemic appears near. This means that UK stock investing could change as companies’ prospects alter. In fact, it already is changing. Stocks popular during the Covid-19-driven lockdowns have fallen out of favour with investors as animal spirits return to the stock markets. Bullish investors have been chasing up share prices of beaten down UK stocks.5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…I think it is entirely possible that the share prices of aviation, travel, and tourism stocks, for instance, will continue to rally. At the same time, otherwise safer stocks will continue to show sideways movements at best. Why I’d buy UK stocks with falling pricesI think this is an opportunity to buy these out-of-favour stocks. There are two reasons for this:#1. Circling back: It is only a matter of time, in my view, before some of the other stocks start looking expensive. This is especially so since they will take time to recover their financial health. Think of the likes of easyJet and Cineworld.By comparison, defensives and Covid-19 gainers will look a lot less pricey. This is visible already. The FTSE 100 consumer goods biggie, Unilever has an earnings ratio of only 15 times today. Its share price as I write, is less than it was last year at this time.#2. Long-term value: Over time many of these shares have the ability to generate solid capital gains for investors even with such ups and downs. Consider the energy provider, National Grid, a multinational with near secure demand. It has not had a fun ride at the stock markets since the market rally started in November. I reckon this can change over time, especially as this UK stock resolves its own issues.My two contrarian picksI’d consider buying either Unilever or National Grid at any point. But here, I would like to draw attention to two UK stocks that deserve a special mention, in my view. #1. Fresnillo: The precious metals miner delivered a stellar set of results today. Its pre-tax profit for 2020 is actually up a whole 208%. It also increased dividends. But its share price is down. This continues its declining trend since November. It is true that hedges like gold and silver may truly be out of fashion for a while as the economy inches back to normal. But I think that is exactly the time to start considering buying these UK stocks – when these metals are out of favour. And then I would hold them for the long term. #2. Bunzl: The surprise gainer from Covid-19 finds itself in a similar boat to Fresnillo. The UK stock also released its strong set of results yesterday. Its revenues increased by almost 10% and pre-tax profits are up 23% in 2020. But its share price is not going anywhere either. This is despite the fact that it has a robust outlook for 2021. Moreover, it also affirms positive long-term prospects. That is far more than some of the coronavirus stocks can say. Click here to get access to our presentation, and learn how to get the name of this ‘double agent’! Manika Premsingh owns shares of easyJet. The Motley Fool UK has recommended Fresnillo and Unilever. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors. Our 6 ‘Best Buys Now’ Shares UK stock investing: my 2 contrarian picks for 2021 I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. See all posts by Manika Premsingh There’s a ‘double agent’ hiding in the FTSE… we recommend you buy it! Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee.