See: Debenture. It's a bond backed by just a handshake. Not a milkshake. Then see: Convertible Bond.
This flavor of bond usually converts into stock at some set price. Like...one $1,000 par value of this bond converts into 25 shares of stock, such that the parity price is 40 bucks a share. With the stock at $35 now, you're happy to keep the bond. You'd lose money if you converted it, because 25 x 35 is less than a grand. So a partial convert means that you can convert, say, up to half of the bond, or up to a third, or up to 40% of the bond into shares at some set ratio, like the 25 shares to one bond unit or something like that.
So in this case, you can convert up to 10 shares with that 40% cap on partial conversion. You'd then have remaining 600 bucks of bond that would just go along until its principal was due, boringly pay off, and let you move on in life.
Related or Semi-related Video
Finance: What are Secured Bonds v Unsecu...68 Views
finance a la shmoop what are secured bonds versus unsecured bonds and
debentures okay so that's an insecure bond but we're talking about here is an [Insecure bond hiding under the sheets]
unsecured bond what is an unsecured bond well this is that was an unsecured bond
old school like 15 century old school it was just a handshake one guy promised to [People shake hands]
pay back another 400 pounds of barley in return for three sheep next year or
something like that and the sheep were the payment form not the guarantee and
the bond was loan emic bond ursins word in fact the promise to pay was secured
but by his word or commitment to repay the loans kind of old school debenture
unsecured bonds work similarly today corporations sell debentures to Wall [Corporations sending debentures to Wall St]
Street all the time debenture being a fancy word for an
unsecured bond it's just debt that the company promises [Definition of debenture]
to pay back well if they don't then oh well and yes the debenture holders could
in theory then take ownership of the equity of the company but in reality [Debenture holders take the majority of the company equity pie chart]
unsecured bonds when not paid back almost always mean the death of the CEOs
career and likely also of the careers of all the other members of the management [Gravestones for the management board]
team so while unsecured bonds are notionally more risky than secured bonds
well this issue hasn't been tested all that often in real life okay so if
that's an unsecured bond what's a secured bond well it's one that
is secured by a specific asset or value or other stores of wealth which get [Definition of secured bonds]
forfeited if the lendee doesn't pay back the lender on time and in accord with
the terms of the debt deal example the dung and the restless' is a company that [Sign for 'The Dung and the Restless']
makes fertilizer by collecting old political speeches and grinding them up [Speeches going into the grinding machine]
selling them to farmers in the Midwest you know for a coin but they also own a [Tractor spraying crops]
pork farm which is kind of separate from their main fertilizer biz they need [Hogs Gone Wild logo appears]
money to build a bigger grinder because politicians are giving more speeches
these days you the internet and all that and they [Politician being applauded]
pledged their pork farm as collateral behind that secured bond offering that [Collateral sign on the pork farm]
is if they don't pay back the bond interest and principle on time then they
lose the pork farm to the lenders yeah and that would be a pig mistake... [Guy snorts like a pig]
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