Table:
| FOR THE YEAR ENDED DECEMBER 31 | 2019 | 2018 |
| --- | --- | --- |
| Observable markets data |  |  |
| Equity securities |  |  |
| Canadian | 1,017 | 844 |
| Foreign | 4,534 | 3,770 |
| Debt securities |  |  |
| Canadian | 13,216 | 12,457 |
| Foreign | 2,385 | 2,004 |
| Money market | 219 | 327 |
| Non-observable markets inputs |  |  |
| Alternative investments |  |  |
| Private equities | 2,119 | 1,804 |
| Hedge funds | 1,001 | 1,014 |
| Real estate | 948 | 758 |
| Other | 91 | 93 |
| Total | 25,530 | 23,071 |
Paragraphs:
The following table shows the fair value of the DB pension plan assets for each category.
Equity securities included approximately $15 million of BCE common shares, or 0.06% of total plan assets, at December 31, 2019 and approximately $8 million of BCE common shares, or 0.03% of total plan assets, at December 31, 2018.
Debt securities included approximately $53 million of Bell Canada debentures, or 0.21% of total plan assets, at December 31, 2019 and approximately $68 million of Bell Canada debentures, or 0.30% of total plan assets, at December 31, 2018.
Alternative investments included an investment in MLSE of $135 million, or 0.53% of total plan assets, at December 31, 2019 and $135 million, or 0.59% of total plan assets, at December 31, 2018.
The Bell Canada pension plan has an investment arrangement which hedges part of its exposure to potential increases in longevity, which covers approximately $4 billion of post-employment benefit obligations.
The fair value of the arrangement is included within other alternative investments. As a hedging arrangement of the pension plan, the transaction requires no cash contributions from BCE.
Question:
What does the investment arrangement of the Bell Canada pension plan do?
Answer: hedges part of its exposure to potential increases in longevity