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. See all posts by Harvey Jones Our 6 ‘Best Buys Now’ Shares What a great year 2019 was for investors. Globally, markets ended the year around 25% higher, a result few had expected at the start.Once again, the doom-mongers have entered January in full cry. The US-Iran stand-off has only added to their fears. I’m retaining my usual optimism, but it’s worth looking at some threats to your wealth.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…Online platform AJ Bell has just listed the five biggest worries we may have to face. There will always be things to fret about, so how seriously should we take them?1. Oil price spikePlenty were fretting about oil price following the deadly US drone strike, with Brent crude touching $71 a barrel. AJ Bell investment director Russ Mould said: “If oil jumps by more than 50% year-on-year the global economy tends to slow and if it doubles then a recession is rarely far away.”How worried should we be? Brent has slipped back to $65, roughly at the same level as a year ago. I’m sleeping easily and staying invested in solid shares with good growth prospects and strong dividend yields, whatever the oil price.2. US-China trade talks break downDonald Trump’s trade dispute with China has triggered plenty of volatility although hopes for a resolution are rising, with a ‘Phase One’ deal expected by 15 January. Mould says markets could be hit by any delay, or if China struggles to yield on the vexed issue of its treatment of Western intellectual property. “Global trade flows are slowing and industrial transportation equity indices are lagging, which is not normally a good sign,” he warns.Am I worried? A bit, but this is a long-running process and both sides stand to benefit from some kind of resolution.3. Corporate earnings disappointMarkets may have enjoyed a decade-long bull run, yet profit growth has been modest. Last year, the S&P 500 grew more than 20%, but corporate earnings rose just 4%, according to the Federal Reserve. Mould says today’s higher valuations could look exposed if we see a slump in trade or spike in oil.This is my major worry too, as markets may have raced ahead of the underlying fundamentals. There are still some London-listed top buys out there, though.4. Inflation spikes Remember inflation? Today’s low-growth, low-inflation, low-interest-rate world has left investors scrabbling for yield, with equities a big winner as a result, Mould says. If inflation returns, markets could be in for a shock.Frankly, I can’t see it. We look set for a third decade of low interest rates, as central bankers battle to keep GDP growing and many FTSE 100 shares’ yields are still well above the rate of inflation.5. Tighter monetary policyIf inflation does surge, interest rates will follow as central bankers battle to stop the economy from overheating. That would hit markets, but Mould reckons this would be the biggest surprise of all. I don’t expect monetary tightening this year. The US Federal Reserve is more likely to cut than hike rates, and the eurozone is in no position to tighten. This week, Bank of England governor Mark Carney indicated his willingness to cut, if necessary.Of these five concerns, corporate earnings disappointments seem the most likely threat. I don’t expect global markets to climb another 25% in 2020, but I’m not gloomy. You need to think long term, in any case, and a market dip would be a great buying opportunity. Enter Your Email Address Harvey Jones has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. 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. Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! Any one of these 5 shocks could destroy your wealth this year Image source: Getty Images. I’m sure you’ll agree that’s quite the statement from Motley Fool Co-Founder Tom Gardner.But since our US analyst team first recommended shares in this unique tech stock back in 2016, the value has soared.What’s more, we firmly believe there’s still plenty of upside in its future. In fact, even throughout the current coronavirus crisis, its performance has been beating Wall St expectations.And right now, we’re giving you a chance to discover exactly what has got our analysts all fired up about this niche industry phenomenon, in our FREE special report, A Top US Share From The Motley Fool. “This Stock Could Be Like Buying Amazon in 1997” 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. Harvey Jones | Sunday, 12th January, 2020 Simply click below to discover how you can take advantage of this.