Can U.S. stocks make money even if they fall sharply? Sqqq has risen nearly 59% this year

Recently, the "bargain hunting" strategy has failed periodically. Individual investors in US stocks have begun to change their strategies and are buying a leveraged ETF on a large scale - the fund mainly bet on the decline of the Nasdaq 100 index to profit from the decline of the stock market.

The following is a summary of several common reverse ETFs:

1. Short the S & P 500 index
$Short S&P 500 Proshares (SH.US)$: when the S & P 500 index falls by 1%, SH rises by 1%;
$Proshares Ultrashort S&P500 (SDS.US)$ : when the S & P 500 index falls by 1%, SDS rises by 2%;
$ProShares UltraPro Short S&P500 ETF (SPXU.US)$ : when the S & P 500 fell 1%, spxu rose 3%.

2. Short NASDAQ
$ProShares Short QQQ (PSQ.US)$ : when the NASDAQ falls by 1%, PSQ rises by 1%;
$ProShares UltraShort QQQ (QID.US)$ : when the NASDAQ falls 1%, Qid rises 2%;
$ProShares UltraPro Short QQQ ETF (SQQQ.US)$ : when the NASDAQ fell 1%, sqqq rose 3%.

3. Short Dow Jones index
$Proshares Short Dow30 (DOG.US)$ : when the Dow falls 1%, the dog rises 1%;
$ProShares UltraShort Dow30 (DXD.US)$ : when the Dow falls 1%, DXD rises 2%;
$ProShares UltraPro Short Dow30 ETF (SDOW.US)$ : when the Dow fell 1%, sdow rose 3%.