This is a sign that something is either dripping, leaking, or not draining. But don't panic, sometimes it can be a very minor problem. In the cooling mode, the indoor evaporator coil and the suction line (the large copper refrigerant line in black insulation) sweats.
DEFINITION of 'Zero-Volatility Spread-Z-spread'. The constant spread that will make the price of a security equal to the present value of its cash flows when added to the yield at each point on the spot rate Treasury curve where a cash flow is received.he Z-spread is also known as a static spread.
Volatility is Usually Standard Deviation, Not Variance. In finance, volatility is usually understood as standard deviation. Of course, variance and standard deviation are very closely related (standard deviation is the square root of variance), but the common interpretation of volatility is standard deviation of returns, and not variance. Here you can find more details: