USHY
iShares Broad USD High Yield Corporate Bond ETF
stock BATS ETF

Which bond funds do you recommend? I am also planning to put some percentage of my portfolio in bond ETF and then keep buying VOO or QQM in red days.. i looked at USHY and it is looking a great buy right now specially when interest rates are expected to go down.

High Yield Corporate Bond = junk bond
https://www.investopedia.com/terms/j/junkbond.asp
The reason the share price of the ETF doesn't change much is because the bonds it holds, unlike stocks, don't have capital appreciation. A stock represents an ownership share in a company. If the company is successful and grows in value, the shares of that company also grow in value (capital appreciation).
Bonds are loans. When you buy a corporate bond you are lending the corporation money, and they promise to pay you back with interest. That's it. There is no ownership stake in the company when you loan them money. In the case of USHY, the ETF is taking the money of people who invest in the ETF and using the money to buy junk bonds that the ETF holds. The ETF collects interest from the bonds and distributes it to people who own shares of USHY.
When a company is somewhat shaky, and there is some doubt that they will pay back the loan, their bonds have a low credit rating, also known as junk bonds. In order to get people to loan them money, the companies have to offer higher interest rates in order to get people to buy their junk bonds and loan them money. That's why the yield is "juicy".
Now that you know all of that, is that something you want to get involved with? Buying shares of an ETF that is loaning money to shaky companies? An ETF with shares that don't change much in price? I sure don't, no matter how "juicy" the yield is.
TLDR: don't just chase after "juicy" yields. Always understand what you might be investing in. If you don't understand it, don't buy it.

Which bond funds do you recommend? I am also planning to put some percentage of my portfolio in bond ETF and then keep buying VOO or QQM in red days.. i looked at USHY and it is looking a great buy right now specially when interest rates are expected to go down.

High Yield Corporate Bond = junk bond
https://www.investopedia.com/terms/j/junkbond.asp
The reason the share price of the ETF doesn't change much is because the bonds it holds, unlike stocks, don't have capital appreciation. A stock represents an ownership share in a company. If the company is successful and grows in value, the shares of that company also grow in value (capital appreciation).
Bonds are loans. When you buy a corporate bond you are lending the corporation money, and they promise to pay you back with interest. That's it. There is no ownership stake in the company when you loan them money. In the case of USHY, the ETF is taking the money of people who invest in the ETF and using the money to buy junk bonds that the ETF holds. The ETF collects interest from the bonds and distributes it to people who own shares of USHY.
When a company is somewhat shaky, and there is some doubt that they will pay back the loan, their bonds have a low credit rating, also known as junk bonds. In order to get people to loan them money, the companies have to offer higher interest rates in order to get people to buy their junk bonds and loan them money. That's why the yield is "juicy".
Now that you know all of that, is that something you want to get involved with? Buying shares of an ETF that is loaning money to shaky companies? An ETF with shares that don't change much in price? I sure don't, no matter how "juicy" the yield is.
TLDR: don't just chase after "juicy" yields. Always understand what you might be investing in. If you don't understand it, don't buy it.