The US stock market has witnessed a sea of red lately. More than a third of stocks in the NASDAQ Composite Index (INDEXNASDAQ: .IXIC) have seen share prices fall by an alarming 50% or more from their 52-week highs, plunging the index into correction territory. The turmoil has been attributed to investors being spooked by heightened inflation, rising interest rates and the lingering economic impact from the COVID-19 pandemic. But it is unlikely that share prices will remain depressed forever. If you take a long-term approach to your investments, the current situation could offer some tantalizing investment opportunities. By scooping up shares of high-quality companies that can continue to grow their bottom line, your investment portfolio should grow in tandem as well. Here are four excellent companies with strong prospects for future growth. Upstart Holdings (NASDAQ: UPST) Upstart is an American financial technology company that aims to make borrowing more affordable to the mass public and unlock mobility and opportunity for Americans....