Taiwan Semiconductor Manufacturing Company Limited - Depositary Receipt (Common Stock)
US ˙ NYSE ˙ US8740391003

SecurityTSM / Taiwan Semiconductor Manufacturing Company Limited - Depositary Receipt (Common Stock)
InstitutionD. E. Shaw & Co., Inc.
ManagerDE Shaw
Latest Disclosed Ownership3,058,798 shares
Latest Disclosed Value $ 1,033,720,784
D. E. Shaw & Co., Inc. ownership in TSM / Taiwan Semiconductor Manufacturing Company Limited - Depositary Receipt (Common Stock)

On May 15, 2026 - D. E. Shaw & Co., Inc. filed a 13F-HR form disclosing ownership of 3,058,798 shares of Taiwan Semiconductor Manufacturing Company Limited - Depositary Receipt (Common Stock) (US:TSM) valued at $1,033,720,784 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,951,420 shares of Taiwan Semiconductor Manufacturing Company Limited - Depositary Receipt (Common Stock). This represents a change in shares of 3.64% during the quarter. The current value of the position is $1,335,746,499 USD.

D. E. Shaw & Co., Inc. has a history of taking positions in derivatives of the underlying security (TSM) in the form of stock options. The firm currently holds call options representing 50,400 of underlying shares valued at $17,032,680 USD and put options representing 1,144,000 of underlying shares valued at $386,614,800 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

TSM / Taiwan Semiconductor Manufacturing Company Limited - Depositary Receipt (Common Stock) Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F TAIWAN SEMICONDUCTOR MANUFAC SPONSORED ADS 874039100 3,058,798 107,378 3.64 1,033,721 15.25 0.6216
2026-02-17 2025-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 2,951,420 1,271,785 75.72 896,907 91.20 0.4917
2025-11-14 2025-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 1,679,635 1,177,875 234.75 469,105 312.79 0.2648
2025-08-14 2025-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 501,760 -2,525,980 -83.43 113,644 -77.39 0.0806
2025-05-15 2025-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 3,027,740 2,388,505 373.65 502,605 298.13 0.4474
2025-02-14 2024-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 639,235 63,116 10.96 126,243 26.17 0.0926
2024-11-14 2024-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 576,119 477,733 485.57 100,055 485.11 0.0859
2024-08-14 2024-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 98,386 -334,134 -77.25 17,100 -70.94 0.0160
2024-05-15 2024-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 432,520 -637,469 -59.58 58,844 -47.12 0.0504
2024-02-14 2023-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 1,069,989 -1,074,857 -50.11 111,279 -40.30 0.0972
2023-11-14 2023-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 2,144,846 -204,897 -8.72 186,387 -21.40 0.1946
2023-08-14 2023-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 2,349,743 1,378,286 141.88 237,136 162.42 0.2422
2023-05-15 2023-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 971,457 -1,874,510 -65.87 90,365 -57.37 0.0967
2023-02-14 2022-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 2,845,967 207,304 7.86 211,996 17.19 0.2343
2022-11-14 2022-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 2,638,663 -53,051 -1.97 180,907 -17.79 0.2161
2022-08-15 2022-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 2,691,714 1,401,018 108.55 220,048 63.52 0.2580
2022-05-16 2022-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 1,290,696 472,356 57.72 134,568 36.68 0.1260
2022-02-14 2021-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 818,340 -235,529 -22.35 98,454 -16.33 0.0816
2021-11-15 2021-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 1,053,869 324,900 44.57 117,664 34.33 0.1062
2021-08-16 2021-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 728,969 -1,809 -0.25 87,592 1.34 0.0756
2021-05-17 2021-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 730,778 -3,099 -0.42 86,436 8.02 0.0834
2021-02-16 2020-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 733,877 -664,497 -47.52 80,022 -29.41 0.0715
2020-11-16 2020-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 1,398,374 1,370,163 4,856.84 113,366 6,976.53 0.1160
2020-08-14 2020-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 28,211 3,747 15.32 1,602 37.04 0.0019
2020-05-15 2020-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 24,464 632 2.65 1,169 -15.60 0.0018
2020-02-14 2019-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 23,832 23,832 1,385 0.0016
2019-08-14 2019-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 0 -647,970 -100.00 0 -100.00
2019-05-15 2019-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS 874039100 647,970 -180,272 -21.77 26,541 -13.18 0.0343
2019-02-14 2018-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 828,242 817,306 7,473.54 30,571 6,229.40 0.0421
2018-11-14 2018-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 10,936 -59,445 -84.46 483 -81.23 0.0006
2018-08-14 2018-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 70,381 -1,475,347 -95.45 2,573 -96.20 0.0034
2018-05-15 2018-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 1,545,728 884,452 133.75 67,641 157.97 0.0921
2018-02-14 2017-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 661,276 661,276 26,220 0.0361
2017-11-14 2017-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 0 -12,868 -100.00 0 -100.00
2017-08-14 2017-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 12,868 -88,497 -87.31 450 -86.48 0.0007
2017-05-15 2017-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 101,365 -27,635 -21.42 3,329 -10.25 0.0059
2017-02-14 2016-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 129,000 65,037 101.68 3,709 89.52 0.0063
2016-11-14 2016-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 63,963 -528,238 -89.20 1,957 -87.40 0.0035
2016-08-15 2016-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 592,201 -3,575,481 -85.79 15,533 -85.77 0.0286
2016-05-16 2016-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 4,167,682 1,197,518 40.32 109,193 61.60 0.1959
2016-02-16 2015-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 2,970,164 865,945 41.15 67,572 54.76 0.1006
2015-11-16 2015-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 2,104,219 2,057,804 4,433.49 43,663 4,042.60 0.0643
2015-08-14 2015-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 46,415 -512,775 -91.70 1,054 -91.97 0.0016
2015-05-15 2015-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 559,190 41,197 7.95 13,130 13.26 0.0201
2015-02-17 2014-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 517,993 517,993 0.00 11,593 0.0149
2014-11-14 2014-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 0 -618,521 -100.00 0 -100.00
2014-08-14 2014-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 618,521 305,142 97.37 13,230 110.87 0.0180
2014-05-15 2014-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 313,379 313,379 -79.70 6,274 -77.82 0.0089
2013-11-20 2013-09-30 13F/A-1 TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 0 -1,544,101 -100.00 0 -100.00
2013-08-14 2013-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR 874039100 1,544,101 1,544,101 28,288 0.0532
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F TAIWAN SEMICONDUCTOR MANUFAC SPONSORED ADS Call 50,400 -84.87 17,033 -83.18 n/a n/a n/a
2026-02-17 2025-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 333,200 1,414.55 101,256 1,548.05 n/a n/a n/a
2025-11-14 2025-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 22,000 -26.67 6,144 -9.57 n/a n/a n/a
2025-08-14 2025-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 30,000 -49.58 6,795 -31.21 n/a n/a n/a
2025-05-15 2025-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 59,500 -89.39 9,877 -91.08 n/a n/a n/a
2025-02-14 2024-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 560,700 -71.05 110,733 -67.08 n/a n/a n/a
2024-11-14 2024-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 1,936,600 90.72 336,329 90.57 n/a n/a n/a
2024-08-14 2024-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 1,015,400 306.16 176,487 418.89 n/a n/a n/a
2024-05-15 2024-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 250,000 34,012 n/a n/a n/a
2023-08-14 2023-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-05-15 2023-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 343,200 101.05 31,924 151.07 n/a n/a n/a
2023-02-14 2022-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 170,700 45.15 12,715 57.70 n/a n/a n/a
2022-11-14 2022-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 117,600 -49.57 8,063 -57.71 n/a n/a n/a
2022-08-15 2022-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 233,200 -19.59 19,064 -36.95 n/a n/a n/a
2022-05-16 2022-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 290,000 -36.96 30,235 -45.37 n/a n/a n/a
2022-02-14 2021-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 460,000 209.76 55,343 233.79 n/a n/a n/a
2021-11-15 2021-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 148,500 -52.33 16,580 -55.70 n/a n/a n/a
2021-08-16 2021-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 311,500 -10.64 37,430 -9.22 n/a n/a n/a
2021-05-17 2021-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 348,600 76.86 41,232 91.85 n/a n/a n/a
2021-02-16 2020-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 197,100 57.81 21,492 112.25 n/a n/a n/a
2020-11-16 2020-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 124,900 907.26 10,126 1,338.35 n/a n/a n/a
2020-08-14 2020-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Call 12,400 704 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F TAIWAN SEMICONDUCTOR MANUFAC SPONSORED ADS Put 1,144,000 -26.61 386,615 -18.39 n/a n/a n/a
2026-02-17 2025-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 1,558,900 102.45 473,734 120.29 n/a n/a n/a
2025-11-14 2025-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 770,000 -46.31 215,053 -33.79 n/a n/a n/a
2025-08-14 2025-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 1,434,100 652.81 324,809 927.13 n/a n/a n/a
2025-05-15 2025-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 190,500 -57.21 31,623 -64.03 n/a n/a n/a
2025-02-14 2024-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 445,200 76.32 87,923 100.50 n/a n/a n/a
2024-11-14 2024-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 252,500 43,852 n/a n/a n/a
2024-08-14 2024-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 200,000 -57.26 27,210 -44.10 n/a n/a n/a
2024-02-14 2023-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 468,000 0.00 48,672 19.68 n/a n/a n/a
2023-11-14 2023-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 468,000 -47.88 40,669 -55.12 n/a n/a n/a
2023-08-14 2023-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 898,000 -28.30 90,626 -22.21 n/a n/a n/a
2023-05-15 2023-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 1,252,500 31.25 116,508 63.90 n/a n/a n/a
2023-02-14 2022-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 954,300 -0.01 71,086 8.64 n/a n/a n/a
2022-11-14 2022-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 954,400 -49.68 65,434 -57.80 n/a n/a n/a
2022-08-15 2022-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 1,896,500 22.59 155,039 -3.88 n/a n/a n/a
2022-05-16 2022-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 1,547,000 -10.81 161,290 -22.71 n/a n/a n/a
2022-02-14 2021-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 1,734,500 -7.16 208,678 0.04 n/a n/a n/a
2021-11-15 2021-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 1,868,200 30.42 208,585 21.18 n/a n/a n/a
2021-08-16 2021-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 1,432,500 -11.81 172,129 -10.41 n/a n/a n/a
2021-05-17 2021-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 1,624,300 29.58 192,122 40.56 n/a n/a n/a
2021-02-16 2020-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 1,253,500 24.37 136,682 67.28 n/a n/a n/a
2020-11-16 2020-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 1,007,900 507.17 81,710 767.04 n/a n/a n/a
2020-08-14 2020-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 166,000 59.62 9,424 89.62 n/a n/a n/a
2020-05-15 2020-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 104,000 22.35 4,970 0.63 n/a n/a n/a
2020-02-14 2019-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 85,000 4,939 n/a n/a n/a
2019-11-14 2019-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-08-14 2019-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 30,000 -40.00 1,175 -42.63 n/a n/a n/a
2019-05-15 2019-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADS Put 50,000 150.00 2,048 177.51 n/a n/a n/a
2019-02-14 2018-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR Put 20,000 0.00 738 -16.42 n/a n/a n/a
2018-11-14 2018-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR Put 20,000 0.00 883 20.79 n/a n/a n/a
2018-08-14 2018-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR Put 20,000 0.00 731 -16.46 n/a n/a n/a
2018-05-15 2018-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR Put 20,000 875 n/a n/a n/a
2016-05-16 2016-03-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR Put 0 0 n/a n/a n/a
2016-02-16 2015-12-31 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR Put 0 -100.00 0 -100.00 n/a n/a n/a
2015-11-16 2015-09-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR Put 16,000 0.00 332 -8.54 n/a n/a n/a
2015-08-14 2015-06-30 13F TAIWAN SEMICONDUCTOR MFG SPONSORED ADR Put 16,000 363 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.