In just six months, around 34 BSE-listed companies with a market capitalisation over Rs 3,000 crore have delivered spectacular returns of more than 100%. But the story includes more than just these eye-popping gains. During the June quarter, Foreign Institutional Investors (FIIs) increased their stake in 27 of these high-flying stocks. Even more striking, in 11 companies, FIIs more than doubled their holdings compared to the March quarter.This is worth watching because FIIs are known for their research-driven investment approach. They typically deploy capital only after extensive due diligence, making their portfolio moves an important signal for investors. In this report, we also spotlight the top three stocks with the highest FII holdings, offering a closer look at where smart institutional money is placing its bets. (Data Source: ACE Equity) Smart money move