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    SIPC Coverage on Short Sell Proceeds?

    Does anyone know whether the insurance provided by SIPC covers short sell proceeds kept by a brokerage company such as IBKR? I know IBKR will pay some interest on the short sell proceeds kept in the brokerage account but I am not sure if it means it is counted as an asset covered by SIPC. If...
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    Does redistribution of historical data need licensing from brokers or exchnages?

    Thanks for sharing your experience. It answers many questions I have in mind for long.
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    Hosting service providers in Equinix NY4 or NY5: any recommendation?

    Would you mind explaining a little more about what KCIX does? I browsed its website but still couldn't figure out how it is related with trading use. The list looks probably what I am looking for. Thanks!
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    Why Are There So Few Exchange-Traded Bonds Compared to Dealer-Sold Bonds?

    I've been curious about the relative lack of exchange-traded debts (ETD) compared to dealer-sold bonds, particularly in the corporate market. While some bonds go to exchanges (only about 180~200 issues), the vast majority are sold through dealers. I thought that the transparency and reporting...
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    Hosting service providers in Equinix NY4 or NY5: any recommendation?

    I'm in the process of looking for colocation services in Equinix NY4 or NY5 datacenters for my business. I'm hoping to get some recommendations from the community on which hosting service providers offer these services and at what costs. If you have any experience with colocation or dedicated...
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    Prohibition on Market Making Trading Behavior in US Equity Option Market

    Thank you for the information, Robert. I'm still a bit unclear on the concept of execution cost. Is it just the priority given to orders or are there other factors at play, such as the order tagging you mentioned? I'm also curious about the reason for the difference in regulations between equity...
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    Prohibition on Market Making Trading Behavior in US Equity Option Market

    I recently came across a condition in Interactive Brokers' agreement that states clients cannot have market making trading behavior in US equity options. The condition looks very strict. I'm curious about the legality of this condition and whether there have been any challenges or discussions...
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    Does redistribution of historical data need licensing from brokers or exchnages?

    Thanks for Tessa's explanation. This is great news for me. Would you mind sharing an example of where we can find a venue's policy on redistributing historical data? I did find an academic paper, "Understanding the market for US equity market data" by Charles M. Jones that makes the same claim...
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    Does redistribution of historical data need licensing from brokers or exchnages?

    If I collect market data from some third party (such as brokers or some service API) and redistribute the data with others (could be for profits or non-profit), do I need to get licensing from exchanges? I am thinking about a project to build something like wikipedia for market data where...
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    Capital Allocation for Portfolio of Multi-Strategy and Multi-Instrument

    Thanks! It is a example to remind us of the limitation of mathematical approximation. As I mentioned before, Markowitz's theory is valid if return is not distributed too widely, e.g. interval (-40%, 50%). The example with 100% loss with 1% probability is out of reach of Markowitz's theory...
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    Capital Allocation for Portfolio of Multi-Strategy and Multi-Instrument

    After I read Markowitz's review (Markowitz 2010)on his theory, I would say Markowitz's assumption is not asinine. All he assumed is the expectation utility can be approximated by Taylor expansion to second order, i.e. the mean and variance. The functional form of utility is not very important if...
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    Capital Allocation for Portfolio of Multi-Strategy and Multi-Instrument

    What do you mean by MAX(w1 * LN(R1) + w2 * LN(R2) + ... + wN * LN(RN))? If it is exactly what it literally means, the weight will concentrate to the instrument with maximum historical return. This allocation completely ignores diversification, which is not ideal. Or if you mean MAX E(w1 *...
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    Capital Allocation for Portfolio of Multi-Strategy and Multi-Instrument

    I would like to know if there is a way (or theory) to manage a multi-strategy, multi-instruments portfolio that would calculate the optimal weight to allocate capital for each combination of strategy and instrument (sometimes we may find one strategy works for many instrument or vice versa)...
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