A blunt warning that concentrated stock bets favor insiders over regular investors — bad for anyone holding too few names.

• The stock market can act like a piggy bank for the big shareholders who own most of a company.
• Regular investors get diluted when companies hand out stock-based pay to employees and executives.
• That dilution quietly chips away at the value of shares small investors hold.
• The fix offered is simple: spread your money around instead of betting big on one or two stocks.

Outlook: Expect the same advice to hold near-term — diversify to avoid getting squeezed by insider dilution.