What Are Corporate Bond Spreads?

Bond spread trading refers to incorporating funds at a lower interest rate and investing in higher-yield bonds to earn spreads.

Bond carry trading

Right!

Bond spread trading refers to incorporating funds at a lower interest rate and investing in higher-yield bonds to earn spreads.

Carry itself has the meaning of "spread." Carry (positive carry / positive spread) commonly used in investment means the situation that "the investment income is higher than the financing cost of the investment". Carry trade generally refers to the carry trade on foreign exchange, that is, borrowing a currency with a lower interest rate, and then buying and holding a currency with a higher yield to earn a spread.