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seen Feb 1 at 22:36

May
24
comment Order submission strategies of a rational market maker?
@richardh Intra day short sells (short sells that are netted against a long position before the end of the trading day) are often provided for free by the sponsoring broker. This holds even for a lot of retail brokers. Since the market maker can be assumed to close all his positions by the end of the day short sells are literally free.
May
20
comment Algorithm for the choice of stocks for a equity scalper/market maker to engage in?
chris: Yes, I upvoted answers that I felt demonstrated real world hft/quant experience, and most of your answers certainly do. Sorry didn't know that multi-upvoting was discouraged. Won't do that again.
May
19
comment Algorithm for the choice of stocks for a equity scalper/market maker to engage in?
Why? Please elaborate :-)
May
19
comment Algorithm for the choice of stocks for a equity scalper/market maker to engage in?
chris: Yes, "shares" should have been "stocks". Thanks for notifying I've now s/share/stock/g. English is not my native language :-)
May
19
comment How are dual class shares different from non dual class shares from a market makers' perspective?
Maybe I'm missing something but you write "would be more interested in making a market with the higher volatility Bar shares". Doesn't the inventory risk of the market maker increase with volatility. That is, doesn't a rational prefer (ceteris paribus) to make a market in a low volatility asset?