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Quantopian is home to 120,000 people learning algorithmic trading, including students, data scientists, academic researchers, developers, and finance professionals. We provide a re…

Time to go update the FAQ! The business plan changed in October '14 - evidently we missed that reference.

Quantopian's revenue model is to build a hedge fund and charge the fund investors returns/management fees. The algorithms in the hedge fund come from the Quantopian community. We w…

There's a slightly different methodology here, but one consistent with what you're looking for. On one line, buy-and-hold the S&P 500. Re-invest all dividends. You are 100% in the …

The Fortune article refers to analysis done by my colleague Karen Rubin. The research was done in an IPython notebook, on the Quantopian platform. You can see (and copy) the full n…

We have a contest every month. The next deadline is April 1, and the prize awarded on April 30th.

We work very hard to make our interests aligned with our community members' interests. We don't literally make money from the algorithms in the contest. What we're doing is encoura…

It's both forward-testing and backward testing. The algos have been locked since submission - some were submitted as early as 1/15, all were submitted by 2/2. That makes it both an…

I think you're looking at the trees, and you should step back and look at the forest. The fraction of CEOs that are women is dramatically smaller than the fraction of the populatio…

We get this question at Quantopian periodically. You retain ownership of the content you put in our system; everything you write is yours. Your intellectual property remains privat…

Another solution is to write the algorithm but avoid the hedge fund - lots of suits, and they take most of the money. You're better off if you trade it yourself. People work for he…

High-frequency algorithms are producing less profits. Other forms of algorithmic trading are growing.

Very neat story. Thanks for writing it up. The nuts and bolts of this kind of operation are fascinating. I know a lot of people out there have trading ideas, but don't really know …

Aneth. . . . you're reading our mind. Come back to Quantopian on Thursday. I think you'll like what you see. Yes, there are people who trade today and make money using algorithms. …

The benchmark on Quantopian is indeed modeled after the S&P 500. How would the algo do in 2008? It's trivial for you to check it yourself. Click the "clone algo" button, change the…

Cash management is built already. We track how much you have, dividend payments, all that stuff. We've built many risk measurements, too: alpha, beta, Sortino, Information Ratio, e…

Yeah. This algo is highly leveraged - like 15X. It's possible to really lose your shirt if you trade this algo exactly. Taibo's algo is interesting as a starting point. It's not on…

Interactive Brokers will be our first integration.

There aren't a ton of hurdles left before we start offering "live trading" on Quantopian. We have all the pieces, we just need to stitch them together. A couple more months, I thin…

That's a very interesting system you've built. The the thing about backtesting a strategy is that it is very easy to make a mistake in your backtester. Look ahead bias is the most …

I'd argue that a lot of the hard parts of algo writing are solved by Quantopian. Hard: * Data. You need to test your idea. Most historical stock data (like Yahoo) excludes companie…

You might be interested in zipline, an open source backtester written in Python. Zipline, Quantopian's open source backtester (yes, I work at Quantopian). The backtester is designe…

We wrote a bunch, and used a bunch, so there is no straight answer. A short list: highcharts for charting, jquery and underscore for the glue, crossfilter for data filtering, boots…