Credit spread: ETFs & Stocks

Lightspeed said: "My second question for the day is, as far as credit spreads go, I seem to be focusing mainly on ETFs simply because they have less gap ups or downs. I have not even looked into trading credit spreads on stocks. Do any of you trade stocks? What do you do, or prefer more, ETFs or stocks? Do you find spreading on stocks more riskier? Cheers guys!"