Reverse mortgage businesses account for a bigger share of this year’s mortgage-related casualties.

The Mortgage Graveyard hosted by MortgageDaily.com provides details on failed or closed mortgage-related firms.

Analysis released Tuesday shows that Bank of America, OneWest Bank’s Financial Freedom, and Wells Fargo pulled out of the reverse mortgage lending market earlier this year.

Together, these three lenders accounted for about 46 percent of the market for Home Equity Conversion

Mortgages (HECM), the Federal Housing Administration’s reverse mortgage program.

The study noted that one factor impacting the dwindling sector is the possibility that missed payments of taxes or insurance by a borrower could trigger a default on federally insured reverse mortgages.

“[L]enders don’t want to be in a position where they would have to foreclose on a senior,” according to Mortgage Daily.

During the first six months of this year, a total of 74 mortgage-related firms have failed or shut down their operations, Mortgage Daily says. Over the same period last year, the tally was 109.

Fewer banks have failed compared to last year at this time, but the same can’t be said for credit unions.

Forty-eight banks insured by the FDIC went under during the first half of 2011, down 44 percent from the 86 that failed in the January to June timeframe last year.

The 16 credit unions seized by the National Credit Union Administration this year represent a 45 percent increase over the 11 that were closed during the first half of 2010.

Non-bank closing tally 10 so far this year, compared to 12 for the same period last year.