All about bitcoin lending

Last update: April 03, 2016

Risk involved

If you lend money in any way: Yes it is risky.

Margin Trading

If you lend Bitcoin on trade exchanges, your money goes on margin trading.

Risk of lending to margin traders

If a trader borrowed to trade but the market moves against them, at some point the position will be force-closed by the system.

But it can happen that the market will move too fast for the system to close the position in time. In that (unlikely) case the trader would get a negative balance. The borrowed funds would not be repaid which means the lender loses too.

BTCUSD market is typically not so volatile. Altcoin trading can pump and dump tragically though.

Preventing this risk?

There is no way to prevent this risk. On top of that, on trade exchanges all lending is processed by lending bots. You cannot choose whom you lend the money:

The only way to minimize the risk is to split your money and lend different currencies on different places.

Peer-to-peer Bitcoin Loans

Even low risk plans count on defaults: There will always be someone who doesn’t pay back.

That’s why autoinvest bots split your deposit into very small chunks and lends these.

You need to do a very high amount of contracts to get the statistical effect and reach the expected value.

Bitfinex Margin Funding

If you open a trading account on Bitfinex you automatically have access to exchange trading, margin trading and margin funding.

The latter are indeed Bitcoin loans to other traders.

On Bitfinex you can lend out USD, BTC or LTC. You can choose the section on the Margin Lending tab, see picture above.

It makes sense, people borrow to go long (USD) or short (BTC) and there are a few altcoin traders too. (Though on Bitfinex, if you are used to the BTCUSD market, you should know the altcoin volumes are lower.)

How to lend money on Bitfinex

By default you get three different types of wallets on Bitfinex:

exchange, trading, deposit:

You can either choose to lend your money at once and get them back once the contract is over, or you can choose to autorenew. This way your money will be offered for loans again as soon it is available.

Your interest will be auto-offered too. That means your profit should grow since you will be offering more and more money over time.

Autorenew on Bitfinex:

Funds in loans are blocked

During the time your funds are borrowed they are blocked. You will not be able to stop the loan if you get to need the money.

The funds will be still shown in your total balance in deposit wallet but not as available balance.

What are hidden offers

If you have a lot of money that you want to chuck in Bitfinex lending you can opt for hidden offer.

Bitfinex margin lending interests

By and large on Bitfinex you are quite well off if you lend out USD. To lend out BTC or LTC, you will find the interest rate is typically very low.

Interest rates for lending out USD are fairly high.
You can expect somewhere between 0.1% and 0.5% per day.
The rates for lending out BTC and LTC are,
on the other hand, usually very low.
Around 0.005% per day is "normal".

(Bitfinex Wiki)

Bitfinex Lending Bots

There is a PHP bot for lending management making sure your money is out at the high possible rate. Since the script is in PHP you can easily run it from a web server if it’s secure enough. Download from GitHub.

If you don’t like PHP, there is another lending bot written in Go. Download here.

Check your payouts

There have been rumors on Reddit that Bitfinex underpays margin funding earnings. It occurred repeatedly, the most recent post is from January 2016.

As you know, what is on Reddit is always true /s.

Nonetheless it is a good idea to check your earnings in any case.

Since there are records of all your transactions you don’t need to check your interest earnings very often like every week. There will always be an opportunity to contact the support.

Ledger Wallet protects your bitcoins

How to check Bitcoin interest earnings on Bitfinex

Bitfinex: Dummy numbers

Started with: $5000

Offer funding for 2-30 days max, autorenew, fixed rate 0.1% daily.

Your interest is 4000*(0.001*30-0.001*30*0.15)=$102 after fees. Plus some change from the $1000 on smaller loans.

Earned: ~2% monthly profit (Not bad.)

Started with: 5BTC

Offer funding for 2-30 days max, autorenew, fixed rate 0.005% daily.

Your interest is 5*(0.00005*20-0.00005*20*0.15)=0.00425 BTC after fees.

Earned: ~0.09% monthly profit (Not much.)

Poloniex lending

You might have several reasons to want to lend out Bitcoin and not USD.

For those of you who want to work with cryptocurrencies only Poloniex will be the best choice.

Poloniex is an estabilished exchange for altcoin trading.

Many markets over there, and a lot of money to be made or also lost.

Altcoins might be riskier since altcoin markets are at time very volatile.

How to start lending on Poloniex

Your Poloniex account comes with three sets of wallets for all currently listed coins:

exchange, margin trading and lending

Switch to the lending tab, you should already see your balance there.

If you check out the interest rates, you see they are not bad.

That’s it. The loan system is automatic, you cannot choose whom you lend.

Interest rates on Poloniex

To lend out Bitcoin you will be OK with a rate of 0.1% - 0.6%. See

Yes, that’s what you get for lending fiat on Bitfinex.

Remember that on Poloniex, Bitcoin is the fiat. Poloniex only handles cryptocurrencies and Bitcoin is the base currency of majority of the trades.

Why high interests won’t always earn you more

So you might get lucky and get a loan offer filled that has a daily rate of 0.88% and contracts for 60 days. Good on you, but to count on this is not very wise.

Usually the daily interest rates will oscillate, depends how lively the altcoin trading is. It has been more lively recently but the rates still oscillate. Also, most traders are after quick profit. They will borrow for 2 days, after that the lending system looks for a new trader that would borrow your funds.

In an ideal world your earnings would simply grew with the interest rate you offer. Your loan offers would get filled every day, your money would never stop earning, you could dictate the interest rate and there would always be a borrower.

Chart 1: Ideal lending earnings.

In the real world though your money will never be earning at all times. If you set your interest rate low, like 0.12%, you have a fair chance you will hit full 30 days activity. The inactivity is higher if your suggested interest rate is higher.

Chart 2: Lending earnings that are a bit closer to reality. You see that doubling the rate will not earn you twice as much because the offer will be unfilled for more days than a cheaper offer.

So, in any situation there will be an interest rate that will give you best returns over the timeframe, and it will not be the highest possible interest rate. You can imagine it similar to Chart 3, but note that this is just an example. The curve shows what your monthly earnings would be if the number of days where your loans are active depends on the interest rate by a simple linear relationship. With the dummy numbers used here, your maximum earnings would be with an interest rate of 0.5% daily.

Chart 3: Dummy numbers in action.

In some situation it might be better to stick with an average interest rate and just keep it open with autofill, but you might as well differentiate and always keep some money to lend at high rates. In case of a spike these offers will get filled but for the most part the money will sit there doing nothing.

Dummy numbers once again - What kind of returns are to see?

These are real returns after one month of lending without any lending bot. The account was simply checked once in the morning and once in the evening. All money went into lending, none was traded.

Initial balance: 5 BTC
Final balance: 5.1271266 BTC
Monthly earning: 2.54%
Average daily interest: 0.08%

You see that this could possibly be the worst lending result ever - the daily interest was on average far below where the coins were lent. That means most of the time the money was sitting there, not provided in a loan. Good news is that since interest rates on Poloniex rarely drop below 0.1% you will see results better than this with help of a lending bot.

Poloniex lending bots

As ideal as it gets.

While it is not feasible to check the current interest rates all the time you can have a bot that will do that for you. It is a python code that will try to spread your money in your lending wallet across the lending book offers. It doesn’t guarantee you will always get the highest possible rate but it will help to spread your money so that you will pick up the spikes.

The bot was posted on Reddit, code is available for free on GitHub.

The Poloniex lending bot in action:

On the first run it will ask you to edit a config file, filling in your API key and secret.

You can also change the default minimum and maximum acceptable interest rate and the amount of single offers to split your lending equity into. Do change the minimum, at the very least, the defult value is some 0.06% which with the boom of altcoin trading now is far too cheap.

The bot keeps waiting and calling the exchange every 60 seconds. If there is some money returned to your lending wallet it will attempt to lend them. As it makes a lot of offers that are to high to be immediately filled you have to wait a few minutes.

The lending book updates every minute, to be honest the bot gives you better chance to hit the spikes. Placing a high offer first when you see it in the web book is often already too late.

This is the result - all offers taken, rates are fine (1.498%, right?!). The default 2 day length of loan was changed by the bot to 60 days.

You can kill the bot once your money is borrowed, it only places the orders and it is not necessary to keep the bot running to have the orders active. But with the bot off you might miss returned money that could be lent again right away. It is certainly better to keep the bot running.

This is one of the ways that is as close to Bitcoin passive income as it gets. Do the math though, if you (realistically) earn 5% netto per month, you still only earn 0.5 BTC on each 10 BTC you lend.

Check your payouts

There have been no rumors about Poloniex on Reddit. Still, it is a good practice to check if you are getting paid what you earned.

On Poloniex you can indeed view your full trading history. Your lending reports are part of it:

Poloniex: Dummy numbers

Started with: 5BTC

Offer funding for 2-30 days max, autorenew, fixed rate 0.13% daily.

Your interest is 5*(0.0013*30-0.0013*30*0.15)= 0.16575 BTC after fees.

Earned: ~3% monthly profit (Fine, isn’t it?)

Ledger Wallet protects your bitcoins

Bitcoin P2P Lending

Ok, there are some people out there who don’t like the fact that Poloniex needs no verification and that Bitfinex is a Hong Kong company with servers in Milan, Italy. To some people, these things are just dodgy.

It is true that apart from borrower defaulting on payback you are also exposed to the risk that the exchange will exit scam, get hacked, go titsup and so on.

(BTW. The danger of your account getting hacked is low enough if you use 2FA. Either way, people wouldn’t be able to steal anything that is tied in a loan from your account.)

So, there are a few reasons to keep some of your money in other institutions as well.

If you want to diversify and offer loans outside of trade exchanges and make sure some of your money will not be used for speculations, you can try places like BTCJam.

To invest Bitcoin you don’t need to get verified.

Update 3 April ‘16

Historical data of coinmarketcap. Ethereum collapsed as everybody stopped believeing in the bubble, now it is only doing small movements. Much like MaidSafeCoin or Factom, for that matter.

Snapshot mil. USD price USD
February 28, 2016 495 6.4
March 06, 2016 880 11.4
March 13, 2016 1104 14.2
March 20, 2016 821 10.5
March 27, 2016 858 10.9
April 03, 2016 915 11.6

So what more does it say than that the market cap and price are correlated?

Well, that no one is trading!

All altcoin volumes dropped and Bitcoin has been boring lately anyway. Where do you think all the coins went? Not to Bitcoin markets indeed.

Large part went to lending, where else. Interest rates on Poloniex dropped roughly one decimal place.

People, I know it’s a drag but someone will have to do the hard work of actually trading.

Have some inspiration about value of altcoins.

First posted:

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