When interest rates rise, bond prices will fall and depreciate the company's assets. Many start-up companies arenot profitable, which they can’t raise fund and must burn their deposits to stay developing. Depreciation of assets while shrinking deposits may threaten the survival of banks. When the SVB’s news came out, investors came to worry that SVB may go bankrupt. Such panic sparked to all banks, and San Francisco bank First Republic also fell by 15%.