Top Most Difference between FIX 4.2 vs FIX 4.4 in FIX connectivity

FIX 4.2 vs FIX 4.4

FIX protocol has evolved over time; it’s now more than a decade it’s started by Fidelity and Solomon Brothers. FIX connectivity is the most popular connectivity solution exists for trading whether its equities, futures, options or fixed income or even foreign exchange (FX). FIX protocol has dominated the market and become as standard solution for any market or broker which is trying to develop connectivity with market within a short period of time because of complexity of native exchange api and lack of support FIX protocol come as handy.

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Top Most Things to note down while writing your own FIX Engine on FIX protocol

This is in continuation of my FIX protocol tutorial, i am just sharing some of thoughts which are important to remember while writing FIX engine for FIX protocol , though there are couple of professional third party FIX engines are available you may need to write your own if your firm requires.
While writing your own FIX engine I would suggest paying attention to certain points which could save lots of time during maintenance phase

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Top Most FIX Protocol Tutorial for beginners

I have been writing FIX Protocol Tutorial from last few months and today I thought about doing a revision on all those tutorials. It’s very easy to read and forget about anything you have learn so periodic revision is very important and I see its important here as well. In this article I will put summary of each of my previous FIX Protocol Tutorials and give a link back to original article for further reading. This will allow any beginner or new comer to get an idea of what topics from FIX has been already covered in these tutorials and helps them to quickly navigate between those. With growing use of  online trading and electronic trading for various Asset classes such as futures ,options, equities , Fixed Income and Commodities and growing number of online stock trading companies and broker in world market demand of FIX Protocol developers  are increasing day by day and now I can see more jobs for FIX developer than few years back. This  is a niche area and these online stock trading companies or brokers pay very good for any one who is very good knowledge of  FIX simply because it’s very difficult to find a good FIX Protocol developer

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Top Most Financial Information Exchange (FIX) Protocol Interview Questions Answers

Financial Information Exchange (FIX) Protocol Interview Questions and Answers
Some more Fix protocol interview question , I will put answer along when I'll get some time for now just questions :) 

Now I have updated it with answer, Please let me know if you have any doubt, or you have other questions, you can also contribute by any question asked during any FINANCIAL INFORMATION EXCHANGE (FIX)  protocol interview.

What do you mean by Warrant?
Warrant is a financial product which gives right to holder to Buy or Sell underlying financial security, its similar to option with some differences e.g. Warrants are normally issued by banks while options are primarily traded in exchange.

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Top Most FIX Protocol tutorials: Difference between Session Level Reject and Business message Reject

FIX Protocol tutorials: Difference between Session Level Reject and Business message Reject
In FIX protocol there are multiple ways of rejecting message some of them are using an Execution Report (MsgType=8) and ExecType=8 to reject a FIX message if it can not be acceptable by exchange e.g. Sending order for an exchange and link between broker and exchange is down. Another way of rejecting message is OrderCancelReject (FIX MsgType=9) which is used to reject amend (OrderCancelReplace message FIX MsgType 35=G) and cancel (OrderCancelRequest FIX MsgType=F) messages if its not possible to modify or cancel original message e.g. Sending Cancel request to an already filled order will be rejected by OrderCancelReject message in FIX protocol.

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Top Most Common issue on financial information exchange (FIX) Connectivity

FIX Protocol Session Connectivity

Hi guys, in this post I would like share my experience with financial information exchange (FIX) Connections which is essential to setup FIX connectivity for trading purposes. Financial information exchange (FIX) Connections used in both Client Connectivity and Exchange connectivity space (in case exchange supports financial information exchange (FIX) Protocol or you are connecting to any broker via FINANCIAL INFORMATION EXCHANGE (FIX) Protocol).

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Top Most Repeating groups in FIX Protocol

FIX Protocol repeating group
In this FIX protocol tutorial I am going to share my experience about FIX repeating block or group. This is fundamental concept of FIX protocol and used to carry repeating data. Correct understanding of various available FIX repeating groups e.g. PartyID block, Allocation repeating group etc is very important for writing FIX based software. In this FIX tutorial I will explain about how to parse a repeating group, how to prepare a repeating group and how to understand a repeating group. If you like to know more about basic concepts in FIX protocol then you may find my FIX Protocol tutorial interesting.

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Top Most Basics of FIX protocol and FIX Engine

FIX protocol is Industry standard protocol for electronic trading , with evolution with computer technology Trading also getting Electronic and now most of the exchanges in the world are fully electronic and concept of trading floor is taken over by computers.When I was new to FIX protocol I have searched net to find a good FIX protocol tutorial but not much is available so I am trying to write my own experience in form of short  FIX protocol tutorial.

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Top Most FIX protocol tutorial : Fix Session is not connecting how to diagnose it ?

In this blog post of FIX protocol tutorial series I would like to share my experience with connectivity issues around Fix Engines. to exchange message or say to trade electronically clients connect to broker using FIX protocol and for that they use FIX Engine. In FIX protocol connection between two FIX Engine is refereed as FIX Session and we normally say whether FIX Session is connected or not connected. FIX Session normally have there start time , end time and EOD time (End of day time) also called TradingSession start time , Trading Session End Time and Trading Session EOD time.

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Top Most Replaying messages in FIX protocol

Replaying messages in FIX protocol

In FIX Protocol two FIX engines communicate with each other using FIX messages and every FIX messages is assign with unique sequence number denoted by tag 34. Apparently every FIX engine has two sequence numbers Incoming Sequence Number (which FIX engine is expecting from counter party) and Outgoing Sequence Number (which FIX engine is sending to counter party). This sequence numbers along with rules specified in FIX protocol technical specification ensures that no FIX engine should lose any FIX messages in the event of any disconnect.
In this FIX Protocol Tutorial we will discuss some scenarios where disconnect between two FIX Engine occurs and how they recover from that situation. Normally disconnect and reconnect can cause replay of messages which would be require from either party e.g. either client or broker based upon who has higher sequence number.


This FIX Protocol Tutorial is in continuation of my earlier tutorial FIX Protocol Session or Admin messages tutorial and Difference between FIX 4.2 vs FIX 4.4 in FIX connectivity.

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Top Most Top 5 FIX Protocol Data Dictionaries and Online FIX References

While you work on FIX Protocol you need a handy FIX Data dictionaries or what we called fixionary in order to refer for exact details related to particular message type, particular fix tag and what does a particular value of tag means. Without FIX data dictionary or fix wiki it’s very hard to work especially when you are dealing with different fix protocol versions like FIX 4.0, FIX 4.1, FIX 4.2 and FIX 4.4. In this FIX Protocol article we will explore some of free available fixionaries or fix protocol reference guides. FIX data dictionary is a must have development tool for FIX protocol developers.

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Top Most What is FIX Engine in FIX Protocol

FIX Engine is in heart in FIX protocol Implementation, whenever we discuss about FIX protocol we talk about FIX engines, performance of different Fix engines, support of different FIX versions on FIX engine etc. but on basic level we definitely like to know what is a FIX engine and what does FIX Engine do in FIX protocol. In this article we will try to touch base on such questions with an independent view on FIX engines.

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Top Most Top 20 FIX Protocol Interview Questions

Top 20 FIX Protocol Interview Questions
its' been a while since I shared FIX protocol interview questions. So here is the new set of top 20 FIX protocol interview questions. These are the question which is mostly asked in while interviewing any developer or support professional which has some knowledge of FIX protocol. Given the number of clients, broker and exchange using FIX protocol it’s really a great thing to have in your resume and can land you some very well paying jobs in street. These questions not only serve as quick reference before heading for a FIX protocol job interview but also opens new path of learning for guys who are new in FIX and trying to understand it.

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Top Most FIX protocol and fix messaging interview questions

FIX (financial information exchange)  protocol is the global protocol used for Electronic trading of different asset classes e.g Equity, Fixed Income FX (foreign exchange) , Derivatives Futures and Options and its knowledge is essential to understand Electronic trading and FIX messages. I have listed some of the very common but informative questions asked in fix protocol interview question, this list is by no means complete and only contains questions on top of my mind, I would encourage reader to post any question they have been asked and I will include in this list, Please feel free to ask any other question related to FIX (financial information exchange) protocol I would be happy to answer those. FIX messaging is term used to describe communication using FIX protocol.

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Top Most Interview question asked on Financial Information Exchange (FIX) Protocol

Here are some of the common questions asked on any  FIX (financial information exchange)  protocol or financial interview , these questions are just some on top of my mind please add any other questions you have faced in your financial interview position , I would add them in list.

·         What is an Exchange?

·         What is the difference between a Stock and a Bond?

·         What is the difference between Sell Orders and Short Sell Orders?

·         What is naked short and what is covered short?
What is the difference between an ECN and an exchange?

·         What is FINANCIAL INFORMATION EXCHANGE (FIX) Protocol?

·         What is limit order?

·         What is a market order?

·         What is a stop or stop loss order?

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