These 2 FTSE 100 stocks have thrashed the market but are they too expensive now?

first_img 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. Our 6 ‘Best Buys Now’ Shares Harvey Jones | Tuesday, 16th March, 2021 | More on: ANTO FERG 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. “This Stock Could Be Like Buying Amazon in 1997” Image source: Getty Images These 2 FTSE 100 stocks have thrashed the market but are they too expensive now? While many FTSE 100 stocks have struggled lately, these two growth monsters have been busy making investors rich. Mining giant Antofagasta (LSE: ANTO) and plumbing and heating products distributor Ferguson (LSE: FERG) have grown an astonishing 168% and 64% respectively over the past 12 months.This isn’t just a Covid-19 quirk. Measured over five years they are up 238% and 136% respectively. Both published results today, and both reported a further jump in profits. I think Antofagasta and Ferguson are two of the most exciting stocks on the FTSE 100, but as ever in life there is a catch.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…You can probably guess what it is, too. After such barnstorming growth, these FTSE 100 stocks are looking a little expensive. So would I buy them today?Both shares are recovery playsUnderlying full-year profits at Chile-focused copper miner Antofagasta jumped 12.3% last year to $5.12bn, on revenue growth of 3.3%. Sales volume fell, but copper and gold prices compensated by rising around 25%. Profits were further boosted by “the weaker Chilean peso, lower input costs and continued tight cost control”, management said. EBITDA margins increased from 49.1% in 2019 to 53.4%.Antofagasta’s 2020 dividend totalled to 54.7 cents, up 22% on last year, easily beating analyst expectations. The 1.7% forward yield may look low compared to some FTSE 100 mining stocks, but it is covered 2.8 times earnings. Naturally, with all that share price growth, dividends have struggled to keep pace.As with any metals or minerals commodity producer, Antofagasta relies on a booming economy to support demand. Many investors have been buying in anticipation of a strong post-pandemic recovery. Currently, it trades at 44 times earnings, but with a forward valuation of just 22 times. If the recovery disappoints, Antofagasta’s share price could go into reverse. I’m relatively optimistic about the wider recovery, but I think the Antofagasta share price has raced ahead of many FTSE 100 stocks, and I might watch and wait for now.Ferguson, formerly known as Wolseley, is also benefiting from recovery hopes, particularly in the US, where the company mostly operates. These FTSE 100 stocks are flyingThe group posted a 12.2% rise in underlying half-year trading profit. Revenue rose 4.2%, despite one fewer trading day. Management put this down to “excellent cost control”. It also hailed “good operating cash generation and [a] very strong balance sheet”. Ferguson still has an eye on growth, investing $224m in four first-half acquisitions. However, management dampened expectations by flagging up a “very uncertain” second-half outlook, amid supply chain pressures.It also warned of “increasing supply chain pressures, transportation costs and the reversal of temporary cost reduction actions” during the first lockdown. So there are potential setbacks here, which could hit the share price hard because it is also expensive, trading at 21.8 times forward earnings.Ferguson’s forward yield is 1.8%, covered 2.6 times. As with Antofagasta, rapid share price growth makes its dividends look less generous than they really are. This is still a top FTSE 100 income stock. Ferguson also treated shareholders to a $400m buyback, following the sale of Wolseley UK.I like both FTSE 100 stocks, but marginally favour Ferguson. US President Biden’s $1.9trn stimulus splurge should give it a lift, along with the rest of the US economy. Let’s just hope that recovery arrives soon.center_img Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! 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. Simply click below to discover how you can take advantage of this. Enter Your Email Address 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. 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