There's a record $5.3 trillion is cash on the sidelines as investors get more bearish on stocks. Here's why that could mean big gains ahead.

• Investors can't stop piling up cash, with assets in money market funds ballooning to a record $5.3 trillion.
• The surge in cash comes amid a combo of high interest rates and depressed investor sentiment towards the stock market.
• But that massive pile of cash could be the fuel needed to drive the next bull market rally.

Investors are hoarding cash at record levels and there's no sign of the trend reversing amid high interest rates and depressed investor sentiment towards the stock market.

Money market fund assets have ballooned to a record $5.3 trillion, with inflows surging by $588 billion over the past ten weeks, according to a recent note from Bank of America.