The best flexible Cash ISA interest rate on the market at the moment is just 1.36%. With interest rates expected to stay low for the foreseeable future, it is unlikely this level will increase any time soon.As such, investors may be better off seeking an income from high-quality, high-yield dividend stocks. In many cases, these companies also offer the potential for capital gains as well as income.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…With that in mind, here are two 10% yielding dividend stocks that could offer long term income investing potential and capital growth.NewRiver REITReal estate investment trust (REIT) NewRiver REIT (LSE: NRR) has seen its share price underperform over the past 12 months due to challenges in the retail sector.However, despite these issues, the company has continued to report rising incomes from its property portfolio.Management has also been repositioning the portfolio, selling low-quality properties and reinvesting the proceeds back into high-quality assets with trustworthy tenants. This strategy has so far helped the company avoid some of the pain its peers are suffering.Still, despite this progress, NewRiver currently trades at a significant discount to its net asset value, with its price-to-book (P/B) ratio being 0.8. On top of this, the stock currently offers a dividend yield of 11%. With the payout backed by income from property rents, as well as asset sales, this yield looks exceptionally safe.These metrics indicate that NewRiver’s shares offer excellent value for money with a wide margin of safety at current levels. Therefore, now could be a good time to take advantage of the continued uncertainty surrounding the business and buy a share of this income champion.Redde plcAnother income stock that yields more than 10% today is Redde (LSE: REDD). Like NewRiver, Redde has fallen on hard times over the past 12 months. A poor trading update at the beginning of 2019 cut the stock in half.After this setback, the accident management assistance and vehicle management company has been working flat out to return to growth. It seems as if trading has improved since the profit warning with analysts expecting a slight improvement in earnings per share for 2019, which implies that the business has started its turnaround.Despite this progress, the company’s shares continue to trade on a low valuation. The stock has a price-to-earnings (P/E) ratio of just 8, which suggests that the capital growth prospects for it could be high.It also supports a dividend yield of 10.9%, with the payout being covered 1.1 times by earnings per share. These metrics imply that Redde’s total return prospects could be big.With the company committed to returning to growth, now could be the time to buy Redde and take advantage of the stock’s low valuation, as well as its market-beating dividend yield. These metrics suggest the business has the potential to deliver a growing sustainable passive income to its investors for many years to come. Simply click below to discover how you can take advantage of this. Our 6 ‘Best Buys Now’ Shares Rupert Hargreaves owns no share 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. Forget the top Cash ISA rate! I’d pocket 10% here 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. See all posts by Rupert Hargreaves Image source: Getty Images “This Stock Could Be Like Buying Amazon in 1997” 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. Rupert Hargreaves | Wednesday, 8th January, 2020 | More on: NRR REDD Enter Your Email Address 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. 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