President Donald Trump held a promotional event for Tesla at the White House. Elon Musk accompanied him and the two essentially provided a sales pitch about the automaker. Their efforts led to a slight bump in Tesla stock price after an abysmal few months.

Multiple factors have converged to drive down the price of Tesla stock by 50% since December. Here's how investors can manage their portfolios’ volatility.

Tesla shares dropped more than 15% on Monday, making it the worst performer in the S&P 500 Index. Tesla’s stock has dropped by nearly half in three months. Even so, investors are still debating whether Elon Musk’s electric-vehicle maker remains overpriced.