Stradle or Straddle: How To spell?

The word Stradle is misspelled against Straddle, a noun meaning "A stock option giving the holder the double privilege of a "put" and a "call," i. e., securing to the buyer of the option the right either to demand of the seller at a certain price, within a certain time, certain securities, or to require him to take at the same price, and within the same time, the same securities."