DIAMOND SHAMROCK &lt;DIA> SETS PRORATION FACTOR

  Diamond Shamrock Corp said it will
  accept about 27 pct of the 73,653,000 shares of its common
  stock tendered in response to the company's offer to pay 17
  dlrs a share for 20 mln shares.
      The company said it expects to mail checks representing the
  purchase price of the 20 mln shares purchased later this week
  and will be returning unpurchased shares shortly thereafter.
  

