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1  Economy / Trading Discussion / Re: Bitcoin arbitrage on GitHub: ~2% monthly return, market-neutral long/short on: October 17, 2016, 01:43:11 PM
Is the 2% still a recent number? I'm seeing arbitrage options which open but seem to take too long too close. e.g. currently there is a diff. between bitfinex and bitstamp for days of 0.9%. This means in return that while you keep it open you also pay interest on the short position of approx. 0.01% / day which can diminish your opportunity if the close takes too long.

What I also don't quite understand, why this gap seems to be so persistent, sure the gap is too small to be closed by a regular arbitrage trader with the normal fees but there should be still buyers/seller who buy/sell btc for the purpose of speculation.
https://www.weforum.org/agenda/2016/04/why-bitcoin-exchanges-arent-as-straightforward-as-they-seem
2  Alternate cryptocurrencies / Speculation (Altcoins) / Understanding the Risk of Margin Trading on: September 12, 2016, 10:22:53 AM
Hello,

I'm working on an arbitrage trading bot (Bitfinex) and I want to estimate the real risks of margin trading. I want to trade USD (or TUSD) with BTC.

From my understanding if I short sell Bitcoin, I borrow BTC, sell them and rebuy them later to pay back the borrowed amount. The lending fees are also in the borrowed currencies and add up to the leverage, are they?

If now the BTC/USD ratio rises, the platforms use my USD to backup and buy the BTC automatically, when I may not be able to reverse the lending on my own.

Questions 1)
What is if there is a huge change in the ratio and the platform is not able to rebuy them?

Questions 2)
Is my risk limited to the amount of USD on the account, or can it go no-limit? I read a story about a student loosing 30k.

If I want to include other platforms, e.g. Poloniex where I can't short with TUSD, I need to use two volatile currencies, which increases the leverage as far as I read but I do not really know how to calculate the leverage and risk in there.

Questions 3)
How can I calculate my real risk?

Questions 4)
Can I avoid the leverage (besides the interest) if I only borrow as much as I have backup USD. (I want to keep the leverage risks, small)
3  Local / Trading und Spekulation / Margin Trading & APIs on: August 05, 2016, 09:10:47 AM
Hallo,

ich würde gerne sichergehen ob ich die APIs einiger Anbieter richtig verstehe. So wie ich das verstehe gibt es im Grunde zwei Möglichkeiten Margin Trades zu machen:

1) Ich leihe das Geld vorher und kaufen dann im zweiten Schritt sobald ich das Geld habe
z.B.
https://www.okcoin.com/about/rest_api.do
POST /api/v1/borrow_money
POST /api/v1/trade
In diesem Fall habe ich aber den Kredit trotzdem auch wenn mein Buy danach nicht akzeptiert wird (z.B. Kursänderung -> nicht mehr vorhanden)

Zur Rückabwicklung muss ich dann diese Schritte in umgekehrter Reihenfolge machen.

Was mich auch etwas verwirrt ist dieser Parameter:
Quote
days days of borrow: fifteen
Wenn ich also z:b. 10BTC leihe und danach "short" verkaufe, was passiert wenn die Tage auslaufen? Kann man solche Kredite auch vorzeitig kündigen?

2) Das Geld wird mit dem Kaufvorgang geliehen & bei Verkauf automatisch wieder zurückgezahlt:
marginBuy oder marginSell

Wenn der Order nicht durch geht fallen auch keine Zinsen an? Oder fallen diese auch an, während der Order noch nicht abgeschlossen ist?
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