Thread: AutoTracker Errors

I think the error reported may have bee a false alarm. I think I see what they thought was happening.

The timing was impecible as I haven't had an error reported in a long time, but the day after I make a major change to the code I get one. Scared me, but I think we're OK.

I will verifiy though as I am waiting to hear back from the person who reported the issue.

Originally Posted by tsptalk

I think the error reported may have bee a false alarm. I think I see what they thought was happening.

The timing was impecible as I haven't had an error reported in a long time, but the day after I make a major change to the code I get one. Scared me, but I think we're OK.

I will verifiy though as I am waiting to hear back from the person who reported the issue.

I don't usually see any issues, but tonight I noticed that I had a gain of 2.72%, but my actual YTD return only advanced 2.45%.

Tom, I'm having a tough enough time as it is without being scalped!

I'll take a look. But before I get to it, are you sure you are not trying to add your returns?

Here is the formula...

100 * (1 + yearly return as of COB 7/12) * (1 + 7/13 daily return)-100)/100

You can't just add them i.e.: (yearly return as of COB 7/12) + (7/13 daily return)

Originally Posted by coolhand

I don't usually see any issues, but tonight I noticed that I had a gain of 2.72%, but my actual YTD return only advanced 2.45%.

Tom, I'm having a tough enough time as it is without being scalped!

It's correct CH. I'll show the math if you'd like.

Originally Posted by tsptalk

It's correct CH. I'll show the math if you'd like.

I never paid that close of attention before. I'll take your word for it.

I get this question a few times a year, so if anyone is curious, here's a quick example of why you can't add returns to get a total...

If you were down 50% for the year going into today, and today you were up 100%, your account would not be up 50% (-50% + 100%). It would be 0% (even).

start = $10,000
-50% = $5,000 (lost 1/2 of account)
+100% = $10,000 (you doubled half of your original money).