In the United States railroad industry a hostler is a type of railroad engineer who moves locomotives in and out of service facilities.  1 Hostler - Definition and More from the Free Merriam-Webster Dictionary. 2  EtymologyOnLine- Hostler.  3 909.663-010: HOSTLER (motor trans.) alternate titles: hook-up driver; yard spotter.
The purpose of radioactive seed localization (RSL) of non-palpable lesions is to localize suspicious tissues for excision with the use of radioactive seeds. RSL differs from current localization procedures, whereby a non-radioactive wire is implanted into the lesion site and excised along with the affected tissue.
The nominal spread is simply the difference in basis points between the Treasury and non-treasury security. For example, if the Stone & Co. bonds have a yield of 5.5% and the comparable Treasury security has a yield of 4.5% the nominal spread is 100 bps. (5.5% - 4.5%). 1  Zero-Volatility Spread or Z-spread. The Z-spread is calculated as the spread that will make the present value of cash flows from the non-treasury security when they are discounted at the Treasury spot rates plus the Z-spread equal to the non-Treasury securities price. 2  This is done by trial and error.