@OnlyETF@Kalle2 Don't worry, there are control mechanisms on the stock market that prevent such strong fluctuations. They are called circuit breakers. If the S&P 500 falls by 7% from the previous day's closing price, trading is interrupted for 15 minutes. At 13% again and at 20% trading is stopped for the day.
The Nasdaq 100 and the S&P500 are similar enough that -30% for the Nasdaq should be out of the question. Although of course -20% is also unattractive if they are triple leveraged.
