I understand where this is coming from and don’t get me wrong I own a lot of value/SMID and it's gone well, but…
Why do you need an advantage? If you’re right, you’re right. Tossing away large/mega caps seems short sighted, just to try and find “hidden gems”
Here are four mega cap stocks. JPM, WMT, CB, XOM.
A bank, a retailer, an insurer, and an oil company. None of these are tech firms. This is what your outperformance over the index looks like if this is all you owned over the last 5 years. 21% CAGR vs 13% for SPY.
And yes, the example isn't perfect, maybe you buy the large/mega caps that go down, maybe you spend your time in HD, DIS, etc. over the last 5 years. But the same can happen if you buy "hidden gems"
If it works, it works. Plenty of ways to win (and lose).
Why do individual investors or small funds buy mega cap stocks? Thousands of investors are looking at those companies, and you have no advantage there. Look for ‘hidden gems’ where your smaller size works in your favor.