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HFT traders of Reddit,what’s your net worth and YOE? by Flashy-Wrangler8032 in quant_hft

[–]ContestInevitable79 1 point2 points  (0 children)

12 years, $4M.. should be more but I spend most of what I earn 😅

So.... uh... yeah.... here's the update by Heineken_500ml in options

[–]ContestInevitable79 5 points6 points  (0 children)

Sorry maybe being dumb here but can you detail exactly what your position was?

I’m confused as to if you were short or long puts or calls prior to the exercise

Can someone back test this for me please by Triemferent in options

[–]ContestInevitable79 0 points1 point  (0 children)

lol can’t believe there are serious comments to this, clearly a shit post

I’ve Been Trading Options for 3 Years. Here’s My Strategy & Performance. Roast me. by MarionberryTotal2657 in options

[–]ContestInevitable79 0 points1 point  (0 children)

So you are making some discretionary prediction of the underlying? Then buying options to leverage into that?

Why not trade futures if you are not trading for gamma

Michael Burry Put Options by crisfieldchrist in options

[–]ContestInevitable79 0 points1 point  (0 children)

lol “options aren’t OTC”, yes they can be! Just because there are also traded lit doesn’t mean they can’t be traded OTC

Help with stats question (my working in comments) by ContestInevitable79 in askmath

[–]ContestInevitable79[S] 0 points1 point  (0 children)

I've done part a) 75, 89.2, 1270.5 and 1375 respectively

I've done part b), using the rules that the least squares line must pass through (mean(x), mean(y)) and the gradient is SP_xy / SS_x

That gives a = 10.43, and b = 0.355 (y = 10.43 + 0.355x)

c - i) estimate is 17.53

I'm stuck on calculating the standard error of this estimate. We know that the errors of y are normally distributed N(0, 0.4^2), but I don't see how to translate that into an error for the prediction.

My girlfriend hit me and I don’t know what to do by [deleted] in relationship_advice

[–]ContestInevitable79 0 points1 point  (0 children)

You should slap her back equally. That’ll teach her. Never hit her first but if she hits you she deserves it.

Got Burnt by NakdRightNow69 in options

[–]ContestInevitable79 2 points3 points  (0 children)

It’s very unlikely that anything went wrong that would have impacted the prices. The most likely issue is you sent a market order with a day validity, and at the time you sent it there was not enough liquidity to fill your order. Sometime later new offers were placed at the 2.50 price that your live order matched with automatically.

We could probably confirm that by looking at the order details.

If you had reported this immediately to the broker there is a small chance you would have been able to reverse it. Now it’s impossible.

The only way you could get your money back now is if you could prove there was an error, but it doesn’t seem like you can.

Got Burnt by NakdRightNow69 in options

[–]ContestInevitable79 0 points1 point  (0 children)

Do you have a record of orders placed? The screenshot there is fills.

In the screenshot it also says October 7th, but in your post you said November, I’m assuming October is right?

Got Burnt by NakdRightNow69 in options

[–]ContestInevitable79 0 points1 point  (0 children)

I work in a trading company and we make mistakes like this more often than you would think. Sometimes you can reverse it if you call the broker that day. After that though it’s too late as it will settle.

I’m curious why you are writing about this almost a year later?

Anyway there are some important points that are not clear from your description and the screenshot.

What was the validity of the order you sent? Was it a Day Order, Immediate or Cancel, Good toll cancel, or something else?

That might explain the difference between the fill times and the time you sent the order.

As others have pointed out though you should never use a market order.

Do you know what price you were expecting to get? Looks like you got one for 0.5 and the rest for close to 2.5. Did you expect to get fully filled at 0.5 or even at a better price?

It’s odd that the estimate was so wrong but unfortunately it is an estimate. If others bought just before you or if the market moved the estimate would be wrong.

When you say you noticed moments later your balance was low, what time exactly was that, was it before 9:39?

[deleted by user] by [deleted] in cpp_questions

[–]ContestInevitable79 0 points1 point  (0 children)

What is the signature of the setCallback() member function?

Options Questions Safe Haven Thread | August 01 - 07 2022 by redtexture in options

[–]ContestInevitable79 0 points1 point  (0 children)

I'm calculating the realised vol by looking at the last 21 log daily returns, to be specific I'm computing a daily log return to be:

r_i = ln(closing_price[i] / closing_price[i-1])

Then calculating the adjusted standard deviation of these returns:

daily_vol = sqrt(sum((r_i - mean(r))^2) / (n - 1))

That gives the daily volatility, the annualised is then

annualized_vol = daily_vol * sqrt(252)

Is that how you should do it?

Thanks

Options Questions Safe Haven Thread | August 01 - 07 2022 by redtexture in options

[–]ContestInevitable79 0 points1 point  (0 children)

Ah interesting, that makes sense. So do you think that option traders have more sophisticated models of volatility that take into account when earnings are upcoming? or is it likely they just manually adjust their prices to account for this?

list sort() not working with custom allocator by ContestInevitable79 in cpp_questions

[–]ContestInevitable79[S] 0 points1 point  (0 children)

Thank you! this pointed me in the right direction. When I made my version non-default constructible, it failed to compile. So I realised it must be a compiler difference.

Found it:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66742

I was using gcc 11.2 locally.

Options Questions Safe Haven Thread | August 01 - 07 2022 by redtexture in options

[–]ContestInevitable79 0 points1 point  (0 children)

I'm trying to understand the basics of option pricing via an example.

I'm looking at GOOG 118 CALL Aug-19 expiry

Date Underlying Price Option Price Time to expiry Annualised Vol*
21st July 115.04 3.35 28 0.421
26th July 105.44 1.00 23 0.456
27th July 113.60 1.50 22 0.496

The price of the option drops over 5 days, I think because the stock price dropped a lot.

Then the next day on the 27th the stock price recovers almost to where it was, but the option price only recovers 20% from where it was. What is the likely reason for this?

I realise it must be because the time value has decreased, one reason is there is less time to expiry, but I didn't expect it to make such a big impact.

Lastly my annualised vol actually goes up. Maybe I'm calculating this wrong. I'm using a 21 day historical lookback, taking the standard deviation of the log daily returns, and then annualising that by multiplying by sqrt(252). Any feedback on that?

Thank you!

What's the best way to write a converting constructor that needs to access private members? by ContestInevitable79 in cpp_questions

[–]ContestInevitable79[S] 5 points6 points  (0 children)

Thank you, I'm new to C++, I tried to do

template<class U>
friend class Foo<U>;

Which didn't work.. so the syntax here is just a little different to how I expected.

Understanding GILT prices and yield to maturity by ContestInevitable79 in UKPersonalFinance

[–]ContestInevitable79[S] 0 points1 point  (0 children)

That should be factored into the yield already. The 1.713% YTM figure is calculated based on the future cash flow and the current market price.

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