Why gamma scalping is not advised for retail traders with reg T margin
My interpretation of that sentence is that you can't do the buying/selling of shares outright (sans margin) because of the massive quantity of shares he's talking about.  So you have to use margin to buy the stocks. However, because in order to make significant money with this sort of strategy you probably need to be working dozens of stocks at the same time, you need to be familiar with portfolio margin.  Since your broker does not calculate margin calls based on individual stocks, but rather on the value of your whole portfolio, you should have experience handling margin not just on individual stock movements but also on overall portfolio movements. For example, if 10% (by value) of the stocks you're targeting tend to have a correlation of -0.8 with the price of oil you should probably target another 10% (by value) in stocks that tend to have a correlation of +0.8 with the price of oil.  And so on and so forth.  That way your portfolio can weather big (or even small) changes in market conditions that would cause a margin call on a novice investor's portfolio.
Can't totally agree with that. Volatility trading is just one trading type of many. In my opinion it doesn't depend on whether you are a professional trader or not.  As you might have heard, retail traders are said to create 'noise' on the market, mainly due to the fact that they aren't professional in their majority. So, I would assume, if an average retail trader decided to trade volatility he would create as much noise as if would have been betting on stock directions. Basically, most types of trading would require a considerable amount of effort spent on fundamental analysis of the underlying be it volatility or directional trading. Arbitrage trading would be an exception here, I guess. However, volatility trading relies more on trader's subjective expectations about future deviations, whereas trading stock directions requires deeper research of the underlying. Is it a drawback or an advantage? I.d.k. On the other hand-side volatility trading strategies cover both upward and downward movements, but you can set similar hedging strategies when going short or long on stocks, isn't it? To summarise, I think it is a matter of preference. Imagine yourself going long on S&P500 since 2009. Do you think there are many volatility traders who have outperformed that? "It looks like these types of companies have to disclose the health of their accounts to CFTC (Commodity Futures Trading Commission). That is the gist I get at least from this article about the traders that lost money due to the Swiss removing the franc’s cap against the euro. The article says about the U.S. retail FOREX brokerage: Most of FXCM’s retail clients lost money in 2014, according to the company’s disclosures mandated by the CFTC. The percentage of losing accounts climbed from 67 percent in the first and second quarters to 68 percent in the third quarter and 70 percent in the fourth quarter. Side note: The Swiss National Bank abandoned the cap on the currency's value against the euro in mid-January 2015. But above paragraph provides data on FXCM’s retail clients in 2014. It could consequently be concluded that, even without ""freak events"" (such as Switzerland removing the franc cap), it is more likely for an investor to NOT make a profit on the FOREX market. This is also in line with what ""sdfasdf"" and ""Dario Fumagalli"" say in their answers." "This is the best tl;dr I could make, [original](http://bruegel.org/2017/07/the-us-retail-crisis/) reduced by 85%. (I'm a bot) ***** &gt; Paul Krugman wonders why aren&amp;#039;t promises to save service jobs as much a staple of political posturing as promises to save mining and manufacturing jobs? One answer might be that mines and factories sometimes act as anchors of local economies, so that their closing can devastate a community in a way shutting a retail outlet won&amp;#039;t.  &gt; Jobs in mining and manufacturing tend to offer higher pay and are far more likely to come with health care and pension benefits than retail jobs.  &gt; In mining the average weekly wage is $1,450, in manufacturing it is $1,070, by comparison in retail it is just $555. This difference in job quality is apparent in the difference in separation rates by industry: it was 2.4 percent for the most recent month in manufacturing and 4.7 percent in retail, almost twice as high.   ***** [**Extended Summary**](http://np.reddit.com/r/autotldr/comments/6nwafx/bruegel_the_us_retail_crisis/) | [FAQ](http://np.reddit.com/r/autotldr/comments/31b9fm/faq_autotldr_bot/ ""Version 1.65, ~169087 tl;drs so far."") | [Feedback](http://np.reddit.com/message/compose?to=%23autotldr ""PM's and comments are monitored, constructive feedback is welcome."") | *Top* *keywords*: **job**^#1 **retail**^#2 **mines**^#3 **manufacturing**^#4 **argues**^#5" "I think you might be asking the wrong question. You have plenty of capital on the side that can be invested. Instead of asking whether you should get an adviser, you might want to examine what your end goal is. Are you looking to build long term growth of you capital? Are you asking about and adviser because you don't want to handle your money, or is it simply because ""that's what people do?"" I would imagine that the answer to 1. is yes and that the answer to 2. is that you want to handle your money, and you always considered this something best left to the advisers. I shall proceed on these hypothetical assumptions. In my humble opinion, I would do the following: Skip the adviser and the fees that go with it. For a young professional like yourself, especially with an engineering background, you can certainly handle the education required to learn the mechanics of investing. Invest some time to learn the fundamentals of the market such as asset classes, basic terminology ect. You will benefit in several ways. For one, you will learn an invaluable skill and save tens of thousands in fees during your lifetime. Moreover, you will have complete control of your risk profile, allocation, and every penny that belongs to you. I really am not bashing advisers, but no one will care as much about your money as you will. And don't be fooled. The market is efficient. An adviser does not have any more edge in a market than anyone else. And from first hand experience, they rarely outperform benchmarks net of fees. I assume you have made it to this step because you want to manage your own money and financial future. Sounds scary, how should one proceed? Let's assume that $100,000 is ""in play"". And since you are learning the ropes, let's leave $50,000 in cash for now. This leaves $50,000 to start a portfolio. I'd start by building a core position of all the major asset classes in ETF form. This means buying things like SPY or TLT. If you're comfortable, you can start selling monthly calls against these positions to reduce basis and earn some income. The point is, your only limitation at this point is taking time to learn the ropes. The technology is there, the free education is there, and liquidity and product mix is there. Next thing you know you're learning how gamma scalping works, or maybe you're more of a Buffett type.  This is how I view finance in general, and truly hope you break through the initial barrier to controling your own finances." &gt; pay a premium to the enthusiastically complicit exchanges for the privilege of scalping those that do not.  I'm assuming you're talking about colocation. Can you tell me how colos enable them to scalp participants without a colo? Give me a breakdown. It seems to be that your main point is this: No matter what, my chances cannot be worse than random and if my trading system has an edge that is greater than the percentage of the transaction that is transaction cost, then I am probabilistically likely to make a profit? In general, yes, that is true, but... Consider this very bad strategy: Buy one share of stock and sell it one minute later, and repeat this every minute of the day. Obviously you would bleed your account dry with fees. However, even this horrible strategy still meets your criteria because: if this bad strategy had an edge beyond the transaction fees you would likely still make a profit. In other words, your conclusion reduces to an uninteresting statement: If there were no transactions fees, then if your trading system has an edge then you will likely make a profit. Sorry to be the bearer of bad news, but IMHO, that statement, and others made in the question are just obvious things stated in convoluted ways. I don't want to discourage you from thinking about these things though. I personally really enjoy these type of thought experiments. I just feel you missed the mark on this one... However, is it a risk that they may withhold liquidity in a market panic crash to protect their own capital?  Two cases exist here. One is if you access the direct market, then they cannot. Secondly if you are trading in the internal market created by them, yes they can do to save their behind, but that is open to question. They don't make money on your profit or loss, their money comes from you trading. So as long as you maintain the required margin in your accounts, you can go ahead. I had a mail exchange with IG Index regarding this and they categorically refuted on this point. Will their clients be unable to sell at a fair market price in a panic crash? No. Also, do CFD providers sometimes make an occasional downward spike to cream off their clients' cut-loss order?  Need proof regarding this, not saying it cannot happen. They wouldn't antagonize the people bringing them business without any reason. They would be putting their money at risk. But you should know, their traders are also in the market. Which might look skimming your money, it would be their traders making money in the free market. After all Google, Facebook etc also sell your personal data for profit, why shouldn't the CFD firm also. Since they are market makers, what is to prevent them from attempting these tricks? Are these concerns also valid for forex brokers serving the retail public? What you consider as tricks are legitimate use of information to make money. "Why would people sell below the current price, and not within the range of the bid/ask? There are many scenarios where this is deliberate but all of them boil down to the fact that the top level's bid doesn't support the quantity you're trying to sell (or is otherwise bogus[1]). One scenario as an example: You're day-trading both sides but at the end of the day you accumulated a rather substantial long position in a stock.  You don't want to (or aren't allowed to[2]) be exposed overnight, however.  What do you do? You place an order that is highly likely to go through altogether.  There's several ways to achieve that but a very simple one is to look at the minimum bid level for which the bid side is willing to take all of your shares, then place a limit order for the total quantity at that price.  If your position doesn't fit into the top level bid that price will well be lower than the ""current"" bid. Footnotes: [1] Keyword: quote stuffing [2] Keyword: overnight margin (aka positional margin, as opposed to intraday margin), this is highly broker dependent, exchanges don't usually distinguish between intraday and overnight margins, instead they use the collective term maintenance margin"