MFBKX Mutual Fund

NAV$12.20

AUM$1.8B

TER0.42%

Holdings429

MFBKX Mutual Fund

NAV$12.20

MFS Corporate Bond Fund Class R6

AUM$1.8B

TER0.42%

Holdings429

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Showing top 15 of 414 holdingsSee all 414 holdings(as of Jan 31, 2026)

#	Ticker ↕	Name ↕	Weight ↓	Shares ↕	Mkt Value ↕	Share ChgPRO	SectorPRO	IndustryPRO
1	-	Mfs Institutional Money Market Portfolio	2.23%	100,714,286	$100.73M	-	Other	Other
2	UBS V3.126 08/13/30	Ubs Group Ag 3.126 08-13-2030	0.76%	-	$34.18M	-	Financials	Banks
3	JPM V2.545 11/08/32	Jpmorgan Chase 2.545 11/08/2032	0.74%	-	$33.56M	Pro	Pro	Pro
4	BA 5.805 05/01/50	Boeing Co Regd 5.80500000 5.805 05/01/2050	0.73%	-	$33.05M	Pro	Pro	Pro
5	-	Charles Schwab Corp Sr Unsecured 11/36 Var	0.61%	-	$27.46M	Pro	Pro	Pro
6	BERMUD 5 07/15/32 14	Bermud 5 07/15/32	0.57%	-	$25.86M	Pro	Pro	Pro
7	-	Morgan Stanley 01/30/2037	0.57%	-	$25.72M	Pro	Pro	Pro
8	SUMIBK 1.71 01/12/31	Sumitomo Mitsui Finl Grp Sr Unsecured 01/31 1.71	0.56%	-	$25.29M	Pro	Pro	Pro
9	MXPRLL 7.75 07/15/30	Maxam Prill Sarl Sr Secured 144A 07/30 7.75	0.55%	-	$24.76M	Pro	Pro	Pro
10	T 5 05/15/45	Us T-Bond 5% 05/15/45	0.54%	-	$24.62M	Pro	Pro	Pro
11	CABKSM V6.84 09/13/3	CAIXABANK SA V/R 09/13/34	0.53%	-	$23.94M	Pro	Pro	Pro
12	AIB V6.608 09/13/29	Aib Group Plc Regd V/R 144A P/P 6.60800000	0.50%	-	$22.42M	Pro	Pro	Pro
13	AMH 5.25 03/15/35	American Homes 4 Rent Lp 5.25% Mar 15, 2035	0.50%	-	$22.40M	Pro	Pro	Pro
14	NWMLIC 6.17 05/29/55	Nomura Holdings Inc Variable Rate	0.50%	-	$22.51M	Pro	Pro	Pro
15	NXPI 5.25 08/19/35	Nxp Bv / Nxp Funding Llc / Nxp Usa 5.25% 08/19/2035	0.48%	-	$21.87M	Pro	Pro	Pro
See the other 399 holdings of MFBKX Every position with sector, industry and share changes, as reported Jan 31, 2026. Get FundXLS Pro: $29/moFirst 500 subscribers, then $49/mo. Cancel anytime.

MFBKX Mutual Fund All Holdings

MFBKX holdings total 429 positions. The top 10 holdings account for 7.9% of the fund, led by Mfs Institutional Money Market Portfolio at 2.2%, Ubs Group Ag 3.126 08-13-2030 at 0.8%, Jpmorgan Chase 2.545 11/08/2032 at 0.7%.

MFBKX portfolio concentration is well-diversified, with the top 10 representing 7.9% of total assets. The largest sector exposure is Financials at 31.4%.

MFBKX sector allocation provides a detailed breakdown. MFBKX overlap tool shows how holdings compare to other funds in your portfolio.