The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 390 to 700 nm. In terms of frequency, this corresponds to a band in the vicinity of 430â770 THz.
P/FCF = Market capitalization / Free Cash Flow. The Price-to-Free Cash Flow (P/FCF) ratio a popular valuation ratio among value investors. It is similar to the P/E ratio but free cash flow is just operating cash flow minus capital expenditures.
Also like a P/E ratio, the lower the number, the better. Currently, the average Price to Cash Flow (P/CF) for the stocks in the S&P 500 is 14.05. But just like the P/E ratio, a value of less than 15 to 20 is generally considered good.