SoFi Technologies Inc. (SOFI) had some bad news for shareholders after the closing bell Thursday: the company is selling a bunch of new stock, and existing investors aren't thrilled about it.

Why the Stock Is Sliding

The digital financial services company announced plans to raise $1.5 billion through a public offering of common stock. That's a lot of new shares hitting the market, which means dilution for current shareholders — and the market responded accordingly.

SoFi is also giving underwriters a 30-day option to snap up an additional 15% of the shares being offered, a pretty standard feature of these deals that could push the total even higher.

So what's the money for? According to the company, the proceeds will go toward beefing up its capital position, creating more strategic flexibility, making capital management more efficient, and funding various growth initiatives and business opportunities. In other words, the usual corporate finance playbook when you want to bulk up your balance sheet.

For context, SoFi reported approximately $3.25 billion in total cash and cash equivalents as of September 30. So this offering would represent a meaningful boost to the company's cash cushion.

Market Reaction

Investors weren't particularly excited about the dilution. SoFi shares dropped 5.74% in after-hours trading Thursday, falling to $27.90. That's a pretty typical reaction when a company announces it's issuing more stock — more shares outstanding means each existing share represents a smaller piece of the pie.

The timing is interesting too. Companies often tap the public markets when their stock is riding high, allowing them to raise capital on favorable terms. Whether this proves to be smart capital allocation or unnecessary dilution will depend on how effectively SoFi deploys the cash.