Quote from dst:
The yield you see is yield to worst; it could be calculated using different price (bid or ask or last), and this is what you see in corresponding yield columns (bid yield, ask yield, last yield); âcurrent bid yieldâ or âcurrent ask yieldâ is simple linier approximation of yield (in nutshell: coupon divided by relevant price) see more on this in User Guide and in knowledge base article
We did show yield and current yield in different terms, 9440d TWS beta is being posted with this corrected â all yields will be shown in % term in columns.
We do not display YTM since for callable bonds this number is not indicative (and likely misleading).
http://www.investopedia.com/terms/y/yieldtoworst.asp
The yield to worst is calculated by making worst-case scenario assumptions on the issue by calculating the returns that would be received if provisions, including prepayment, call or sinking fund, are used by the issuer.
yield to worse can't be 0.013 or whatever number was on screnshoot(maybe, maybe you mean 0.013 *100? and forgot to multiply by a 100?) then it would make some sense.. even if it's called right after customer bought it. the price at ask was 97.83.
as i said before-in finance world most commonly used are those two-to worst and YTM. YTM might be misleading,but it is up to the customer to figure this out. it's all right on front of him. he have to assume that his bonds might be called at any time. and make appropriate calculations\adjustments. and you have to NAME them properly or at least provide that information in help file. as i said-i have no idea,what is the difference in your TWS between current ask yield and ask yield. sounds confusing,isn't?