Thats a bit of a pointless question, you need that much of most of the resources, to enable the chief to build the stronghold.

I know I looked this up once before so I have just rechecked.

The english billion was changed to  exactly the same as the american million ages ago.

1 billion is 1 thousand million. 1000,000 000.

It used to be much more a million million  1000,000,000,000; which is now a trillion.

True, I do miss the old standards. 

I know some Jarls don't like to send their gold to the stronghold or clan bank and have shields for years. 

Do you mean  loot rather  than gold, because I am sure many jarls would like to know how to send gold anywhere?

As to banks, its a question that has puzzled me a while, what is the maximum resources that a clan bank can reach, it will eventually reach maximum capacity,then what?

I know the tax  reduces but isn't it better not to have to pay tax there and back, and just use your own resources?

I don't think you can send gold, the main thing is to get through the checkpoints in the clans battle and kingdom battle for a lot of gold. Sadly since the last few updates the points for the checkpoints have got huge so it is much harder now to collect gold form events.

I don't know anyone who has had more than 5M gold at a time.

As to banks, I think the town vault has a limit as to how much resources is saved in an attack and there is a limit as to how much you can produce. I think you can hold an unlimited amount of resources in the town and the clan stronghold also has an unlimited capacity. 

You posted this

"I know some Jarls don't like to send their gold to the stronghold or clan bank"

You are right about the town vault saving a fixed amount from being taken in a raid.

However,my experience has been that once the vault is full, you cannot send resources  to a town anymore, hence my question about the usefulness of a bank, how quickly does the bank fill?

If the bank built up so it can store resources, and then buildings destroyed, so it doesnt produce any resources,that would seem to be silly.

I do not know about unlimited capacity in a stronghold vault, but I have been told that once you send resources there, you cannot get them out, if that's so its not very useful as a bank either.

There is no upper limit to how many resources your town (or a bank for that matter ) can hold. What is limited however, is the amount of resources your farms, mines, etc can produce; this why banks are effective, especially where clan members "hypermax" certain resource(s). As long as they keep sending to the banks before reaching their limit they will continue to produce.

domingo1878 said:

There is no upper limit to how many resources your town  can hold. What is limited however, is the amount of resources your farms, mines, etc can produce; this why banks are effective, especially where clan members "hypermax" certain resource(s). As long as they keep sending to the banks before reaching their limit they will continue to produce.

Though the statement that the town can hold unlimited resources would appear to be true.

I still have to take odds with (or a bank for that matter ) which seems to be against my experience, which is why I asked the question about banks.

Early on in my game a clan member said they couldnt send me resources because my vault was full.I have seen the same message myself when I have tried to send resources.

This would suggest that when a town production is shut down, you cannot send resources there.

I understand the concept of hypher farming, but what exactly is the mechanism for sending unlimited amounts to a bank,which is really just another town?

How does the vault not get full and prevent resources being sent there?

The only limit a vault has is how much resources it will protect from being plundered when the town is attacked.