„Security“

1. Property pledged as collateral to a debt.

2. Protection; assurance; indemnification.

3. A document that indicates evidence of indebtedness or of equity interest – including notes, bonds, debentures, stocks, certificate of interest, etc. which may be traded on an exchange.

Hudson, A. “Equity and Trusts”. 8th ed. Routledge, 2017
Lipson, C.G., and Oldfield, K.S. “Real Estate: Investment and Financial Strategy”. Elsevier, 2016
Mishkin, F.S., and Eakins, S.G. “Financial Markets and Institutions”. 8th ed. Pearson, 2015.