Minus sign in order brings down Stockholm stock exchange.

[rkbabang]

The software couldn't handle signed integers.  It assumes an unsigned integer and thus -6 (0xFFFFFFFA in 32-bit 2s compliment) is  interpreted as 4,294,967,290 contracts worth  $460 trillion.

 

Stockholm stock exchange paralyzed by order for -6 futures

 

[racemize]

wow.