Diversify across multiple brokers?
You should ensure that your broker is a member of the Securities Investor Protection Corporation (SIPC). SIPC protects the cash and securities in your brokerage account much like the Federal Deposit Insurance Corporation (FDIC) protects bank deposits. Securities are protected with a limit of $500,000 USD. Cash is protected with a limit of $250,000 USD. It should be noted that SIPC does not protect investors against loss of value or bad advice. As far as having multiple brokerage accounts for security, I personally don’t think it’s necessary to have multiple accounts for that reason. Depending on account or transaction fees, it might not hurt to have multiple accounts. It can actually be beneficial to have multiple accounts so long as each account serves a purpose in your overall financial plan. For example, I have three brokerage accounts, each of which serves a specific purpose. One provides low cost stock and bond transactions, another provides superior market data, and the third provides low cost mutual fund transactions. If you’re worried about asset security, there are a few things you can do to protect yourself. I would recommend you begin by consulting a qualified financial advisor about your risk profile. You stated that a considerable portion of your total assets are in securities. Depending on your risk profile and the amount of your net worth held in securities, you might be better served by moving your money into lower risk asset classes. I’m not an attorney or a financial advisor. This is not legal advice or financial advice. You can and should consult your own attorney and financial advisor.
VaR does not capture overall risk, it allows you to say a statement, based on our model, K% of the time, losses will not exceed X.  The problem is,   1. How accurate is the statement out of sample?  2. What is the marginal value of this number? Are the choices I make better or worse?  3. Even with a 99.999% confidence level what is the cost to the organization if a decision is made when the model is wrong?  Personally when running multiple strategies, you always need to factor in model risk in your asset allocation/trading, i.e. either shut down or reduce exposure when assumptions are violated or run something else, for example when correlations between strategies increases, it is logical to downsize exposure to those strategies as the risk factor to equity has increased.  1. in the grand context of a bank/financial institution, if the VaR is wrong we can bankrupt or negative, so we may want to diversify revenue streams by avoiding that risk, for example correlations increase across asset classes.  2. Sizing is a key problem for banks, as the question is does model error across various platforms (FI, EQ, FICC, Transactions etc), happen at the same time? An index fund is inherently diversified across its index -- no one stock will either make or break the results. In that case it's a matter of picking the index(es) you want to put the money into. ETFs do permit smaller initial purchases, which would let you do a reasonable mix of sectors. (That seems to be the one advantage of ETFs over traditional funds...?) A travel broker can offer solutions to any concerns about records need for honeymoon holiday vacation- An individual's broker knows essential ending schedules and requirements for us passports, etc. They will help direct you through the process. A complete travel brokers can present you with some expert benefits for honeymoon holiday vacation- Since travel providers are familiar with the right things to ask, they may be capable of coming up with offers that the common person would never come across on their own. Compare the different trading accounts available at Money and MoneySuperMarket. All are regulated by FSA and they give protection according to the FSA standards for client deposits i.e. deposits distributed across multiple banks. I personally hold a trading account from Selftrade. You can find statements like below, in their terms and conditions regarding protection of your money deposited with them. If we cannot meet our obligations, your investment may be protected by the Financial Services Compensation Scheme. Compensation is provided for 100% of £50,000. I have heard of this, but then the broker is short the shares if they weren't selling them out of inventory, so they still want to accumulate the shares or a hedge before EOD most likely - In that case it may not be the client themselves, but that demand is hitting the market at some point if there isn't sufficient selling volume.    Whether or not the broker ends up getting all of them below VWAP is a cost of marketing for them, how they expect to reliably get real size below vwap is my question. Since I've been doing this since late 03 I have colo machines in Chicago and NYC, and have direct exchange data feeds etc.  I mentioned in a prior post though, for someone starting out on algorithmic trading, I'd recommend Nanex for tick data and Interactive Brokers for your brokerage account. IB has a robust and easy to use API. It won't let you do the most low latency stuff bc you can't colo at the exchange and have to clear through their order management systems but if you are looking at opportunities that exist in the market in excess of 50ms it's probably a good place to start. If not, go Lightspeed imo, but that'll cost you on the colo/data a lot more. thanks! hence the etf - I hoped to get an ETF of say 20-25 positions, out of which 12 will lose in value, 10 will stay flat or lose a bit, and 2-3 go AAPL, bringing the total ETF up by a solid 10% or so :) and then the divident game begins. "You can group your like-kind (same symbol, ST/LT) stock positions, just be sure that your totals match the total dollar amounts on the 1099.  An inconsistency will possibly result in a letter from IRS to clarify. So, if you sold the 100 shares, and they came from 7 different buys, list it once.  The sell price and date is known, and for the buy price, add all the buys and put ""Various"" for the date. If you have both long term and short term groups as part of those 7 buys, split them into two groups and list them separately."