With average 10% yields, these mid-cap FTSE shares could supercharge a passive income portfolio

The FTSE 100 is a safe bet when it comes to picking shares, but it seldom offers the best yields. To add a bit of ‘oomph’ to a passive income portfolio, it pays to dig a bit deeper.

Today, I’ve uncovered two mid-cap shares on the UK’s smaller indexes that could provide lucrative dividend returns.

But I’m not just going on the yield — both these shares have impressive return on equity (ROE) and a price-to-earnings growth (PEG) ratio below one. This shows they use their equity efficiently and are well-priced relative to earnings growth.

Let’s dive in.

Polar Capital

Polar Capital (LSE: POLR) seems like a small outfit on the face of things, with a market cap of only £400m. But it’s a major London-based fund manager with upward of £23bn in assets under management (AUM). Not only that, its AUM has grown almost 10% in the past year — during a period when many fund…