Section 27-B. Amortization of gains or losses

Gains or losses realized by
  the aggregate trust fund as a result of transactions  made  pursuant  to
  subdivision  two of section twenty-seven-a, or section twenty-seven-c of
  this chapter, shall be transferred to a  special  asset  account  to  be
  known  as  the  deferred  charge on account of security transactions and
  shall be amortized within such account  on  a  basis  which  matches  as
  nearly  as possible all gains or losses so realized against any increase
  or decrease in income resulting from the reinvestment of the proceeds of
  such transactions, provided that the period of amortization of the  gain
  or  loss  resulting from the disposition of each investment shall not be
  longer than the unexpired period from the date of  such  disposition  to
  the maturity of the investment so disposed of, or on such other basis as
  the superintendent of insurance may authorize in his discretion.